CN210441956U

CN210441956U - Clamping mechanism for gas flow standard device by sonic nozzle method

Info

Publication number: CN210441956U
Application number: CN201921192473.0U
Authority: CN
Inventors: 宋明阳; 岳越野; 李波
Original assignee: Henan Huake Testing Co Ltd
Current assignee: Henan Huake Testing Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-01
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a clamping mechanism of a gas flow standard device by a sonic nozzle method, which comprises a clamping mechanism, an adjusting mechanism and a fixed frame, wherein the fixed frame is rotationally connected with the clamping mechanism, the upper surface of the fixed frame is connected with a tightening hand wheel, one end of the tightening hand wheel is rotationally connected with a tightening piece, one end of the fixed frame is rotationally connected with a fixed lock plate, a fixed lock catch is arranged on the clamping structure at one end of the fixed lock plate, and the fixed lock catch is matched with the fixed lock plate; the clamping mechanism of the gas flow standard device is fixedly connected with the spray pipe through the bolts, so that the clamping mechanism is very inconvenient to detach and maintain or finely adjust, and meanwhile, the positioning mechanism and the positioning plate are arranged, so that the nozzle is convenient to position and stabilize, and the rapid and accurate clamping of the nozzle is facilitated.

Description

Clamping mechanism for gas flow standard device by sonic nozzle method

Technical Field

The utility model belongs to the technical field of sonic nozzle calibration device, concretely relates to sonic nozzle method gas flow standard device clamping machine constructs.

Background

The sonic nozzle is a gradually reducing and gradually releasing channel, when the air flow passes through the gradually reducing section, the speed is increased, the pressure is reduced, the sonic speed formed at the minimum section reaches the critical air flow, and then the velocity kinetic energy is converted into pressure energy through the gradually expanding section, so that the pressure is recovered. According to the national speed type and volumetric flowmeter calibration regulations, the device can carry out factory inspection and periodic calibration on gas flowmeters of speed type flowmeters such as turbine flowmeters, vortex street flowmeters, impeller flowmeters, precession vortex flowmeters and volumetric flowmeters such as waist wheel flowmeters and industrial membrane meters. On the premise of meeting the requirements of calibrating different types of flowmeters, the device has the advantages of low inaccuracy, wide range, high automation degree, multiple types of detected meters, novel structure and the like. The method can be applied to the verification and the test of the gas flowmeter in the petroleum, chemical and urban natural gas industries, and is particularly suitable for metrological verification units, natural gas companies, large industrial and mining enterprises and the like with various types of the to-be-detected flowmeters, wide verification working faces and large flowmeter verification quantity.

The clamping mechanism is characterized in that the clamping mechanism is fixedly connected with the gas flow standard device through bolts, so that the clamping mechanism is inconvenient to detach, maintain or finely adjust.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sonic nozzle method gas flow standard device clamping machine constructs to it all is through bolt and spray tube fixed connection to put forward current sonic nozzle method gas flow standard device clamping machine structure in solving above-mentioned background art, thereby it is very inconvenient when dismantling maintenance or slight adjustment to lead to it, and current sonic nozzle method gas flow standard device clamping machine constructs because the reason of its structure itself, thereby lead to its unable height of adjusting itself, finally be unfavorable for the problem of use.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a gas flow standard device clamping machine constructs of sound velocity nozzle method, constructs, adjustment mechanism and fixed frame including clamping, fixed frame constructs to rotate with clamping and is connected, fixed frame's upper surface is connected with hoops tight hand wheel, the one end of hooping the hand wheel is rotated and is connected with hoops tight piece, the structural fixed hasp that is provided with of clamping of fixed lock tablet one end, fixed hasp with fixed lock tablet cooperatees.

Preferably, the clamping mechanism comprises a clamping frame, an adjusting chassis and a movable roller, and the adjusting chassis and the movable roller are fixedly connected through bolts.

Preferably, the adjusting mechanism comprises an adjusting screw rod and an adjusting bracket, and the adjusting screw rod and the adjusting bracket are fixedly connected through screwing of threads.

Preferably, the cross-sectional shapes of the fixed frame and the tightening piece are both arc-shaped, and the upper surface of the fixed frame is provided with a circular hole.

Preferably, one end of the fixed frame is a fixed end and is connected with a bracket fixedly connected with one end of the top of the clamping frame through a rotating shaft, the other end of the fixed frame is a movable end and is buckled and connected with a fixed lock catch fixed on the bracket at the other end of the top of the clamping frame through a fixed lock plate fixed at the end part of the fixed frame, a positioning plate is fixed on the surface of the top of the clamping frame, and a positioning mechanism corresponding to the positioning plate is arranged on the bracket close to the fixed end of the fixed frame; and a lead screw penetrating through the fixed frame is fixedly arranged between the tightening hand wheel and the tightening piece, a lead screw nut is fixedly arranged at the joint of the lead screw and the fixed frame, and a bearing is arranged at the joint of the lead screw and the tightening piece.

Preferably, the positioning mechanism comprises a pull rod, an expansion spring and a positioning piece fixed at the end part of the pull rod, a through hole is formed in the support, the pull rod penetrates through the through hole, a limiting ring A and a limiting ring B are respectively fixed at the outer end part and the outer surface of the embedding section of the support, a limiting cavity with the length smaller than that of the through hole is formed in the outer side of the through hole, and the expansion spring is distributed between the cavity bottom of the limiting cavity and the end surface of the limiting ring B.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the clamping mechanism of the gas flow standard device is fixedly connected with the spray pipe through the bolts, so that the clamping mechanism is very inconvenient to detach and maintain or finely adjust, and meanwhile, the positioning mechanism and the positioning plate are arranged, so that the nozzle is convenient to position and stabilize, and the rapid and accurate clamping of the nozzle is facilitated.

(2) The height of the clamping frame can be conveniently adjusted by designing the adjusting bracket arranged on the lower surface of the clamping frame, and the problem that the clamping mechanism cannot adjust the height of the clamping mechanism and is finally not beneficial to use due to the structure of the clamping mechanism in the existing gas flow standard device adopting the sonic nozzle method is solved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a part of the adjusting bracket of the present invention;

FIG. 3 is a schematic side view of the fixing plate of the present invention;

FIG. 4 is a schematic side sectional view of the positioning mechanism of the present invention;

in the figure: 1. tightening the hand wheel; 2. a grip tab; 3. a fixed frame; 4. fixing the lock plate; 5. fixing the lock catch; 6. clamping the frame; 7. adjusting the bracket; 8. adjusting the chassis; 9. moving the roller; 10. adjusting the screw rod; 11. a feed screw nut; 12. a bearing; 13. a support; 14. positioning a plate; 15. a pull rod; 16. a limiting ring A; 17. a tension spring; 18. a limiting ring B; 19. positioning plates; 20. a through hole; 21. and a limiting cavity.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: the utility model provides a gas flow standard device clamping machine of sound velocity nozzle method constructs, including clamping machine structure, adjustment mechanism and fixed frame 3, fixed frame 3 rotates through the pivot with clamping machine structure and is connected, the upper surface of fixed frame 3 closes soon through the screw thread to be connected with hoops tight hand wheel 1, the one end of hooping tight hand wheel 1 is rotated through the bearing and is connected with hooping tight piece 2, the one end of fixed frame 3 is rotated through the pivot and is connected with fixed lock tablet 4, the clamping of 4 one ends of fixed lock tablet is structural to be provided with fixed hasp 5, fixed hasp 5 cooperatees with fixed lock tablet 4.

For convenience of use, in this embodiment, preferably, the clamping mechanism includes a clamping frame 6, an adjusting chassis 8 and a moving roller 9, and the adjusting chassis 8 and the moving roller 9 are fixedly connected by a bolt.

In order to adjust the height conveniently, in this embodiment, preferably, the adjusting mechanism includes an adjusting screw 10 and an adjusting bracket 7, and the adjusting screw 10 and the adjusting bracket 7 are fixedly connected by screwing.

In order to fix the nozzle, in this embodiment, it is preferable that the cross-sectional shapes of the fixing frame 3 and the tightening piece 2 are circular arcs, and the upper surface of the fixing frame 3 is provided with a circular hole.

In order to fix the spray pipe at the top of the clamping frame 6 conveniently, in this embodiment, preferably, one end of the fixed frame 3 is a fixed end, and is connected with a bracket 13 fixedly connected to one end of the top of the clamping frame 6 through a rotating shaft, the other end of the fixed frame is a movable end, and is connected with a fixed lock catch 5 fixed on the bracket 13 at the other end of the top of the clamping frame 6 through a fixed lock plate 4 fixed at the end part of the fixed lock plate, a positioning plate 14 is fixed on the surface of the top of the clamping frame 6 through a bolt, and a positioning mechanism corresponding to the positioning plate 14 is arranged on the bracket 13 close; a screw rod penetrating through the fixed frame 3 is fixedly arranged between the tightening hand wheel 1 and the tightening piece 2, a screw rod nut 11 is fixedly arranged at the joint of the screw rod and the fixed frame 3, and a bearing 12 is arranged at the joint of the screw rod and the tightening piece 2.

In order to facilitate the positioning of the nozzle at the top of the clamping frame 6, thereby facilitating subsequent clamping, in this embodiment, preferably, the positioning mechanism includes a pull rod 15, a telescopic spring 17 and a positioning piece 19 fixed at the end of the pull rod 15, a through hole 20 has been opened on the support 13, the pull rod 15 penetrates through the through hole 20, a limit ring a16 and a limit ring B18 are respectively fixed at the outer end of the support 13 and the outer surface of the embedding section, a limit cavity 21 with a length smaller than that of the through hole 20 is opened at the outer side of the through hole 20, and the telescopic spring 17 is distributed between the cavity bottom of the limit cavity 21 and the end surface of the limit ring B.

Example 2

In order to fix the spray pipe at the top of the clamping frame 6 conveniently, in this embodiment, preferably, one end of the fixed frame 3 is a fixed end, and is connected with a bracket 13 fixedly connected to one end of the top of the clamping frame 6 through a rotating shaft, the other end of the fixed frame is a movable end, and is connected with a fixed lock catch 5 fixed on the bracket 13 at the other end of the top of the clamping frame 6 through a fixed lock plate 4 fixed at the end part of the fixed lock plate, a positioning plate 14 is fixed on the surface of the top of the clamping frame 6 in a welding manner, and a positioning mechanism corresponding to the positioning plate 14 is arranged on the bracket 13 close; a screw rod penetrating through the fixed frame 3 is fixedly arranged between the tightening hand wheel 1 and the tightening piece 2, a screw rod nut 11 is fixedly arranged at the joint of the screw rod and the fixed frame 3, and a bearing 12 is arranged at the joint of the screw rod and the tightening piece 2.

The utility model discloses a theory of operation and use flow: after the device is installed, the adjusting screw rod 10 is rotated to slowly unfold the adjusting bracket 7, so that the height of the upper surface of the clamping frame 6 is adjusted until the height reaches the requirement, then the connection between the fixed lock plate 4 and the fixed lock catch 5 is released, then the fixed frame 3 is rotated, the spray pipe is placed on the upper surface of the clamping frame 6, then the fixed frame 3 is rotated to cover the fixed frame 3, the fixed lock plate 4 and the fixed lock catch 5 are used for fixing the fixed frame 3, then the tightening hand wheel 1 is rotated, the tightening piece 2 is continuously lowered under the matching of the screw rod and the screw rod nut 11 until the spray pipe is fixed, and then the normal operation can be carried out;

in addition, when the spray pipe is clamped, the pull rod 15 is pulled firstly, the limit ring B18 compresses the telescopic spring 17, the spray pipe is placed on one side of the positioning plate 14, the pull rod 15 is loosened, and under the action of the telescopic spring 17, the pull rod 15 and the positioning plate 19 are reset and matched with the positioning plate 14 to stabilize the spray pipe on the inner side.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gas flow standard device clamping machine of sonic nozzle method constructs, includes clamping machine structure, adjustment mechanism and fixed frame (3), its characterized in that: fixed frame (3) are connected with the rotation of clamping mechanism, the last surface connection of fixed frame (3) has hooping hand wheel (1), the one end of hooping hand wheel (1) is rotated and is connected with hooping piece (2), the one end of fixed frame (3) is rotated and is connected with fixed lock tablet (4), the clamping of fixed lock tablet (4) one end is structural to be provided with fixed hasp (5), fixed hasp (5) with fixed lock tablet (4) cooperate.

2. The clamping mechanism for the gas flow standard device by the sonic nozzle method according to claim 1, wherein the clamping mechanism comprises: the clamping mechanism comprises a clamping frame (6), an adjusting chassis (8) and a movable roller (9), and the adjusting chassis (8) is fixedly connected with the movable roller (9) through a bolt.

3. The clamping mechanism for the gas flow standard device by the sonic nozzle method according to claim 1, wherein the clamping mechanism comprises: the adjusting mechanism comprises an adjusting screw rod (10) and an adjusting support (7), and the adjusting screw rod (10) and the adjusting support (7) are fixedly connected through screwing of threads.

4. The clamping mechanism for the gas flow standard device by the sonic nozzle method according to claim 1, wherein the clamping mechanism comprises: the cross-sectional shapes of the fixed frame (3) and the tightening sheet (2) are both arc-shaped, and the upper surface of the fixed frame (3) is provided with a circular hole.

5. The clamping mechanism for the gas flow standard device by the sonic nozzle method according to claim 2, wherein the clamping mechanism comprises: one end of the fixed frame (3) is a fixed end and is fixedly connected with a support (13) fixedly connected with one end of the top of the clamping frame (6) through a rotating shaft, the other end of the fixed frame is a movable end, a fixed lock plate (4) fixed at the end part of the fixed frame is buckled and connected with a fixed lock catch (5) fixed on the support (13) at the other end of the top of the clamping frame (6), a positioning plate (14) is fixed on the surface of the top of the clamping frame (6), and a positioning mechanism corresponding to the positioning plate (14) is arranged on the support (13) close to the fixed end of the fixed frame (3); a lead screw penetrating through the fixed frame (3) is fixedly arranged between the tightening hand wheel (1) and the tightening piece (2), a lead screw nut (11) is fixedly arranged at the joint of the lead screw and the fixed frame (3), and a bearing (12) is arranged at the joint of the lead screw and the tightening piece (2).

6. The clamping mechanism for the gas flow standard device by the sonic nozzle method according to claim 5, wherein the clamping mechanism comprises: positioning mechanism includes pull rod (15), expanding spring (17) and is fixed in spacer (19) of pull rod (15) tip, through-hole (20) have been seted up on support (13), pull rod (15) run through-hole (20), the outside end and the embedding section surface of support (13) are fixed with spacing ring A (16) and spacing ring B (18) respectively, spacing chamber (21) that length is less than through-hole (20) are seted up in the outside of through-hole (20), expanding spring (17) distribute in at the bottom of the chamber of spacing chamber (21) with between the tip surface of spacing ring B (18).