CN218719031U

CN218719031U - Axial flow high performance check valve

Info

Publication number: CN218719031U
Application number: CN202222894965.2U
Authority: CN
Inventors: 林祥宜
Original assignee: Shanghai Power Plant Valve Co ltd
Current assignee: Shanghai Power Plant Valve Co ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-24
Anticipated expiration: 2032-11-01

Abstract

The utility model relates to a check valve technical field just discloses axial compressor high performance check valve, which comprises a valve body, valve body top fixedly connected with valve gap, both sides all set up threaded hole in the valve gap, threaded hole female connection has fastening bolt, fastening bolt threaded connection is in the valve body top. The axial flow high-performance check valve does not need to be offline, online maintenance can be realized, maintenance and maintenance time is saved, the surfaces of the inner cavity of the valve body, the flow guide cover, the valve core and the like which flow over are all designed into a streamline type, the front part is round and the rear part is sharp, the surface of fluid flowing over is laminar flow instead of turbulent flow, the spring assists in returning, pressure loss is small, flow state is stable, cavitation is avoided, noise is low, an initial sealing specific pressure is provided for the valve core by the spring on the valve core, good sealing effects of slow opening and slow closing are achieved, the medium Venturi jet is formed by the specially designed curved surface of the flow resistance body, the medium is smooth in operation, low-noise and scouring resistant, the valve is long in wear-resistant service life, and is particularly suitable for severe working environments of working conditions.

Description

Axial flow high performance check valve

Technical Field

The utility model relates to a check valve technical field specifically is axial compressor high performance check valve.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves. The check valve is commonly used as a bottom valve of a water pumping device and can prevent the backflow of water. The check valve and the stop valve are combined for use, and the safety isolation effect can be achieved. The defects are that the resistance is large and the sealing performance is poor when the valve is closed.

Patent net notice number is CN203453558U discloses an axial-flow check valve, and it includes valve body, valve clack sub-assembly and locking screw, valve body integrated into one piece, the valve clack sub-assembly passes through locking screw to be fixed in the valve body, the valve clack sub-assembly includes valve clack, valve shaft and valve clack support frame, the spring is established to the valve shaft overcoat, the spring is installed between valve clack and valve clack support frame, the valve shaft constitutes piston fit with the valve clack support frame, the spring is equipped with the uide bushing outward, the uide bushing constitutes the cooperation of sliding with the valve clack support frame, the uide bushing passes through the welded mode to be fixed on the valve clack, with the uide bushing welded on the valve clack, through the cooperation of sliding between uide bushing and the valve clack support frame, reduce the atress of valve shaft, shared the bearing capacity of valve shaft, also reduced the frictional force of valve shaft in the valve clack support frame through the uide bushing, improved its life, also improved the axiality of valve shaft.

The inventors consider that the following disadvantages arise:

(1) And the surface of the valve clack is not provided with a spring, so that the initial sealing ratio can not be provided, and the slow opening and slow closing effects are poor.

(2) When the valve is used, the surface through which fluid flows is turbulent, and no spring is arranged to assist in returning, so that the defects of overlarge pressure loss, unstable flow state, high noise and the like are caused, and improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an axial compressor high performance check valve to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: axial compressor high performance check valve, including the valve body, valve body top fixedly connected with valve gap, both sides all seted up the screw hole in the valve gap, screw hole female connection has fastening bolt, fastening bolt threaded connection is in the valve body top.

The valve comprises a valve cover, a valve clack support frame, a sealing gasket, a plug bolt, a valve clack support frame and a sealing gasket, wherein the valve cover is arranged in the valve body, the plug bolt is connected with the middle of the valve cover through threads, the valve clack support frame is fixedly connected with the middle of the valve cover, the sealing gasket is arranged between the valve cover and the valve body, and the sealing gasket is sleeved on the surface of the valve clack support frame.

Preferably, the surface of the valve clack support frame is sleeved with an adjusting spring, and the adjusting spring is arranged in the valve cover.

Preferably, the front side of the surface of the valve clack support frame is fixedly connected with an upper fixed shaft, the front side of the surface of the upper fixed shaft is fixedly connected with a first fixed flat key, and the first fixed flat key is arranged in the valve body.

Preferably, a second fixed flat key is fixedly connected to the front side of the surface of the valve clack support frame, a flow resistor is fixedly connected to the bottom of the valve clack support frame, and a valve core is fixedly connected to one side of the flow resistor.

Preferably, the surface of the valve core is fixedly connected with a guide shaft sleeve, the surface of the valve core is sleeved with a compression spring, and the compression spring is arranged in the guide shaft sleeve.

Preferably, the bottom of the flow resistor is fixedly connected with a lower positioning driven shaft, a groove is formed in the bottom of the valve body, and the lower positioning driven shaft is inserted into the groove.

Preferably, the inner wall of the groove is fixedly connected with a shaft sleeve, and the shaft sleeve is arranged at the bottom of the lower positioning driven shaft.

Compared with the prior art, the utility model provides an axial compressor high performance check valve possesses following beneficial effect:

1. the axial flow high-performance check valve has the advantages that the valve does not need to be offline, online maintenance can be realized, maintenance and maintenance time is saved, the overflowing surfaces of the inner cavity surface of the valve body, the flow guide cover, the valve core and the like are designed into a streamline shape, the front part is round, the rear part is sharp, the flowing surface of fluid is laminar flow instead of turbulent flow, the spring assists in returning, pressure loss is small, the flow state is stable, cavitation is avoided, and noise is low.

2. This axial compressor high performance check valve, the case is gone up the spring and is provided initial sealed specific pressure for the case, has realized slowly opening and has closed good sealed effect slowly, and flow resistance body special design curved surface forms medium venturi jet, and the smooth low noise antiscour of medium in this valve operation, wear-resisting long service life, the abominable operational environment of specially adapted operating mode.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor:

FIG. 1 is a schematic view of the whole structure of the present invention;

FIG. 2 is a schematic sectional view of the whole structure of the present invention;

FIG. 3 is a schematic view of the valve cartridge;

fig. 4 is an enlarged schematic view of a structure in fig. 2.

In the figure: 1. a plug bolt; 2. sealing gaskets; 3. adjusting the spring; 4. a valve cover; 5. an upper fixed shaft; 6. a first fixed flat key; 7. a valve body; 8. a second fixed flat key; 9. a flow resistor; 10. a valve core; 11. a compression spring; 12. a lower positioning driven shaft; 13. a shaft sleeve; 14. a guide shaft sleeve; 15. valve clack support frame.

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.

The utility model provides a technical scheme:

the first embodiment is as follows:

with reference to fig. 1 to 2-4, the axial-flow high-performance check valve comprises a valve body 7, wherein a valve cover 4 is fixedly connected to the top of the valve body 7, threaded holes are formed in two sides of the valve cover 4, fastening bolts are connected to the inner threads of the threaded holes, and the fastening bolts are connected to the top of the valve body 7 in a threaded mode.

Threaded hole is seted up to the centre in the valve gap 4, and threaded hole female connection has end cap bolt 1, and fixed connection has valve clack support frame 15 in the middle of the valve gap 4, and valve clack support frame 15 sets up in valve body 7, is provided with seal gasket 2 between valve gap 4 and the valve body 7, and seal gasket 2 cup joints in valve clack support frame 15 surface.

Further, regulating spring 3 has been cup jointed on valve clack support frame 15 surface, and regulating spring 3 sets up in valve gap 4, and fixed axle 5 is gone up to valve clack support frame 15 surface front side fixedly connected with, goes up first fixed flat key 6 of fixed axle 5 surface front side fixedly connected with, and first fixed flat key 6 sets up in valve body 7.

Further, a second fixed flat key 8 is fixedly connected to the front side of the surface of the valve clack support frame 15, a flow resistance body 9 is fixedly connected to the bottom of the valve clack support frame 15, and a valve core 10 is fixedly connected to one side of the flow resistance body 9.

Further, in the above-mentioned case,

example two:

referring to fig. 2-4, on the basis of the first embodiment, a guide shaft sleeve 14 is further fixedly connected to the surface of the valve core 10, a compression spring 11 is sleeved on the surface of the valve core 10, and the compression spring 11 is disposed in the guide shaft sleeve 14.

Furthermore, the bottom of the flow resistance body 9 is fixedly connected with a lower positioning driven shaft 12, a groove is formed in the bottom of the valve body 7, and the lower positioning driven shaft 12 is inserted into the groove.

Further, the inner wall of the groove is fixedly connected with a shaft sleeve 13, and the shaft sleeve 13 is arranged at the bottom of the lower positioning driven shaft 12.

In actual operation, when the device is used, when no medium flows back to the check valve from the direction of the flow resistance body 9, the compression spring 1l pushes the valve core 10, so that the valve core 10 is contacted with the sealing seat, thereby preventing the medium from passing through the check valve, and the valve is closed and sealed. When the medium inflow direction spool 10 enters the check valve, the thrust of the medium separates the spool 10 from the seal seat, so that the medium passes through the check valve and the valve is opened.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. Axial compressor high performance check valve, including valve body (7), its characterized in that: the top of the valve body (7) is fixedly connected with a valve cover (4), threaded holes are formed in two sides in the valve cover (4), fastening bolts are connected with the threaded holes in an internal thread mode, and the fastening bolts are connected to the top of the valve body (7) in a threaded mode;

the valve comprises a valve cover (4), a threaded hole is formed in the middle of the valve cover (4), a plug bolt (1) is connected to the threaded hole in an internal thread mode, a valve clack support frame (15) is fixedly connected to the middle of the valve cover (4), the valve clack support frame (15) is arranged in a valve body (7), a sealing gasket (2) is arranged between the valve cover (4) and the valve body (7), and the sealing gasket (2) is sleeved on the surface of the valve clack support frame (15).

2. The axial flow high performance check valve of claim 1, wherein: the surface of the valve clack support frame (15) is sleeved with an adjusting spring (3), and the adjusting spring (3) is arranged in the valve cover (4).

3. The axial flow high performance check valve of claim 1, wherein: fixed axle (5) on valve clack support frame (15) surface front side fixedly connected with, go up first fixed flat key (6) of fixed axle (5) surface front side fixedly connected with, first fixed flat key (6) set up in valve body (7).

4. The axial flow high performance check valve of claim 1, wherein: the valve clack supporting frame is characterized in that a second fixed flat key (8) is fixedly connected to the front side of the surface of the valve clack supporting frame (15), a flow resistor (9) is fixedly connected to the bottom of the valve clack supporting frame (15), and a valve core (10) is fixedly connected to one side of the flow resistor (9).

5. The axial flow high performance check valve of claim 4, wherein: the surface of the valve core (10) is fixedly connected with a guide shaft sleeve (14), the surface of the valve core (10) is sleeved with a compression spring (11), and the compression spring (11) is arranged in the guide shaft sleeve (14).

6. The axial flow high performance check valve of claim 4, wherein: the bottom of the flow resistor (9) is fixedly connected with a lower positioning driven shaft (12), the bottom of the valve body (7) is provided with a groove, and the lower positioning driven shaft (12) is inserted into the groove.

7. The axial flow high performance check valve of claim 6, wherein: the inner wall of the groove is fixedly connected with a shaft sleeve (13), and the shaft sleeve (13) is arranged at the bottom of the lower positioning driven shaft (12).