CN213206577U

CN213206577U - Check valve for laboratory gas pipeline

Info

Publication number: CN213206577U
Application number: CN202021348610.8U
Authority: CN
Inventors: 黄海
Original assignee: Shanghai Weichuang Standard Gas Analytical Technology Co ltd
Current assignee: Shanghai Weichuang Standard Gas Analytical Technology Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-05-14
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a laboratory gas pipeline check valve, which comprises a valve body and flanges, wherein the two ends of the valve body are provided with the flanges, the left side of the valve body is provided with an air inlet, the right side of the valve body is provided with an air outlet, one side of the valve body close to the air outlet is provided with a valve clack, the upper end of the valve clack is rotatably connected with the valve body through a movable seat, the left side of the valve clack is provided with a slide rail, the slide rail is internally and slidably connected with a slide block, the other end of the slide block is provided with a movable seat II, a movable rod is rotatably connected with the movable seat II, one end of the movable rod close to the movable seat II is sleeved with a limit sleeve, the upper end of the limit sleeve is welded with a fixed rod, the other end of the fixed rod is fixedly connected with the inner wall of, and the fixing bolt is loosened, so that the active carbon filter screen is convenient to replace.

Description

Check valve for laboratory gas pipeline

Technical Field

The utility model relates to a check valve technical field specifically is a laboratory gas pipeline 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 existing check valve has the disadvantages of complex structure, higher cost and lack of filtering effect on gas. Accordingly, we provide a laboratory gas line check valve to solve the problems set forth in the background above.

Disclosure of Invention

An object of the utility model is to provide a laboratory gas pipeline check valve to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a laboratory gas pipeline check valve comprises a valve body and flanges, wherein the two ends of the valve body are provided with the flanges, the left side of the valve body is provided with an air inlet, the right side of the valve body is provided with an air outlet, one side of the valve body, which is close to the air outlet, is provided with a valve clack, the upper end of the valve clack is rotatably connected with the valve body through a movable seat, the left side of the valve clack is provided with a slide rail, the slide rail is internally and slidably connected with a slide block, the other end of the slide block is provided with a movable seat II, a movable rod is rotatably connected with the movable seat II, one end of the movable rod, which is close to the movable seat II, is sleeved with a limit sleeve, a fixed rod is welded at the upper end of the limit sleeve, the other end of the fixed rod is fixedly connected with the inner wall of the valve body, the, the upper end of the conical head is connected with an adjusting screw rod, the adjusting screw rod penetrates through the valve body, a limiting plate is welded at the lower end of the adjusting screw rod, and a hand wheel is installed at the upper end of the adjusting screw rod.

As a further scheme of the utility model, it is equipped with the stopper to be located air inlet department in the valve body, and the left side of stopper is equipped with the active carbon filter screen.

As the utility model discloses scheme further again, the valve body is located the right side department of active carbon filter screen and installs fixing bolt, and the active carbon filter screen passes through fixing bolt and valve body is fixed.

As the utility model discloses scheme further again, the lower extreme department that the valve body is located the valve clack is equipped with and keeps off the ring, keeps off the ring and sets to ring shape.

As the utility model discloses scheme further again, the thread bush is installed to the junction of valve body and adjusting screw rod, and adjusting screw rod threaded connection thread bush.

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

1. when the check valve needs to be opened, the rotating hand wheel drives the adjusting screw rod to rotate, the cone moves downwards, the cone pushes the wedge to move towards the gas outlet direction, the spring is compressed, the movable rod moves towards the gas outlet direction along the limiting sleeve, the movable rod pushes the valve clack to rotate anticlockwise, meanwhile, the sliding block slides along the sliding rail, the check valve keeps an opened state, when the check valve needs to be closed, the reverse rotating hand wheel, the cone moves upwards, under the action of the spring, the wedge moves towards the gas inlet direction, the movable rod pulls the valve clack to rotate clockwise, when the valve clack is closed with the baffle ring, the check valve keeps a closed state, the check valve is simple in structure, the cost is lower, and the check valve is convenient to.

2. The active carbon filter screen plays filterable effect to gas, loosens fixing bolt, the change of the active carbon filter screen of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of a check valve of a laboratory gas pipeline.

Fig. 2 is a schematic structural diagram of a laboratory gas pipeline check valve.

In the figure: 1-valve body, 2-flange, 3-air inlet, 4-air outlet, 5-activated carbon filter screen, 6-limiting block, 7-fixing bolt, 8-valve flap, 9-movable seat I, 10-baffle ring, 11-slide rail, 12-slide block, 13-movable seat II, 14-movable rod, 15-limiting sleeve, 16-fixing rod, 17-spring, 18-wedge block, 19-stop block, 20-conical head, 21-adjusting screw rod, 22-limiting plate, 23-thread sleeve and 24-hand wheel.

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.

Referring to fig. 1-2, in the embodiment of the present invention, a laboratory gas pipeline check valve comprises a valve body 1 and flanges 2, the flanges 2 are disposed at two ends of the valve body 1, an air inlet 3 is disposed at the left side of the valve body 1, an air outlet 4 is disposed at the right side of the valve body 1, a stopper 6 is disposed at the air inlet 3 in the valve body 1, an activated carbon filter screen 5 is disposed at the left side of the stopper 6, a fixing bolt 7 is mounted at the right side of the activated carbon filter screen 5 of the valve body 1, the activated carbon filter screen 5 is fixed to the valve body 1 through the fixing bolt 7, a valve flap 8 is disposed at one side of the valve body 1 close to the air outlet 4, the upper end of the valve flap 8 is rotatably connected to the valve body 1 through a movable seat one 9, a baffle ring 10 is disposed at the lower end of the valve body 1, the baffle ring 10 is disposed in, a second movable seat 13 is mounted at the other end of the sliding block 12, a movable rod 14 is rotatably connected to the second movable seat 13, a limit sleeve 15 is sleeved at one end, close to the second movable seat 13, of the movable rod 14, a fixed rod 16 is welded at the upper end of the limit sleeve 15, the other end of the fixed rod 16 is fixedly connected to the inner wall of the valve body 1, a wedge block 18 is fixedly connected to the other end of the movable rod 14, a stop block 19 is arranged at the upper end of the wedge block 18, a spring 17 is arranged between the wedge block 18 and the limit sleeve 15, the movable rod 14 is sleeved with the spring 17, a conical head 20 is arranged at the inclined plane of the wedge block 18, the conical head 20 is slidably connected with the wedge block 18, an adjusting screw rod 21 is connected to the upper end of the conical head 20, the adjusting screw rod 21 penetrates through the valve body 1, a limit plate 22 is welded at the lower end, and the adjusting screw 21 is screwed with the threaded sleeve 23.

The utility model discloses a theory of operation is:

when the check valve needs to be opened, the rotating hand wheel 24 drives the adjusting screw rod 21 to rotate, the conical head 20 moves downwards, the conical head 20 pushes the wedge block 18 to move towards the gas outlet 4, the spring 17 is compressed, the movable rod 14 moves towards the gas outlet 4 along the limiting sleeve 15, the movable rod 14 pushes the valve clack 8 to rotate anticlockwise, meanwhile, the sliding block 12 slides along the sliding rail 11, so that the check valve keeps an opened state, when the check valve needs to be closed, the reverse rotating hand wheel 24 rotates upwards, the conical head 20 moves upwards, under the action of the spring 17, the wedge block 18 moves towards the gas inlet 3, the movable rod 14 pulls the valve clack 8 to rotate clockwise, when the valve clack 8 and the baffle ring 10 are closed, the check valve keeps a closed state, the active carbon filter screen 5 plays a filtering role on gas, the fixing bolt 7 is loosened, and the replacement of.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a laboratory gas pipeline check valve, includes valve body (1) and flange (2), its characterized in that, the both ends of valve body (1) are equipped with flange (2), and the left side of valve body (1) is equipped with air inlet (3), and the right side of valve body (1) is equipped with gas outlet (4), one side that is close to gas outlet (4) in valve body (1) is equipped with valve clack (8), and the upper end of valve clack (8) is rotated through sliding seat one (9) and is connected valve body (1), the left side of valve clack (8) is equipped with slide rail (11), and sliding connection has slider (12) in slide rail (11), and sliding seat two (13) are installed to the other end of slider (12), and it has movable rod (14) to rotate on movable seat two (13), and the one end cover that movable rod (14) is close to movable seat two (13) is equipped with stop collar (, the inner wall of other end fixed connection valve body (1) of dead lever (16), the other end fixedly connected with wedge (18) of movable rod (14), the upper end of wedge (18) is equipped with dog (19), is equipped with spring (17) between wedge (18) and stop collar (15), and spring (17) suit movable rod (14), the inclined plane department of wedge (18) is equipped with cone (20), cone (20) sliding connection wedge (18), and accommodate the lead screw (21) is connected to the upper end of cone (20), and accommodate the lead screw (21) runs through valve body (1), and the lower extreme department welding of accommodate the lead screw (21) has limiting plate (22), and hand wheel (24) are installed to the upper end of accommodate the lead screw (21).

2. The laboratory gas pipeline check valve according to claim 1, characterized in that a limiting block (6) is arranged at the gas inlet (3) in the valve body (1), and an activated carbon filter screen (5) is arranged on the left side of the limiting block (6).

3. The laboratory gas pipeline check valve of claim 1, characterized in that, the valve body (1) is located the right side of active carbon filter screen (5) and is installed with fixing bolt (7), and active carbon filter screen (5) passes through fixing bolt (7) and is fixed with valve body (1).

4. A laboratory gas pipeline non-return valve according to claim 1, characterized in that the valve body (1) is provided with a stop ring (10) at the lower end of the valve flap (8), the stop ring (10) being arranged in the shape of a ring.

5. A laboratory gas pipeline check valve according to claim 1, characterized in that the connection of the valve body (1) and the adjusting screw rod (21) is provided with a threaded sleeve (23), and the adjusting screw rod (21) is in threaded connection with the threaded sleeve (23).