CN215214901U

CN215214901U - Constant pressure stop check valve

Info

Publication number: CN215214901U
Application number: CN202120335787.2U
Authority: CN
Inventors: 蔡飞; 郭宝; 夏福民
Original assignee: Beijing Valve General Factory Co ltd
Current assignee: Beijing Valve General Factory Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-12-17
Anticipated expiration: 2031-02-05

Abstract

The utility model provides a level pressure is by check valve, which comprises a valve body, the valve clack, a spring, the valve rod, the packing, the valve gap, the gland, valve-stem nut, the hand wheel, the locking double-screw bolt, the valve body upside is equipped with the valve gap, realize the fixed connection between valve gap and the valve body through the locking double-screw bolt, the inside valve clack that is equipped with of valve body, install the valve rod in the valve clack, the valve rod upside is equipped with screw thread portion, the valve rod upwards passes the valve body, the centre bore of seting up in advance on the valve gap extends to the outside of valve gap, the valve rod top is equipped with the hand wheel, install valve-stem nut on the valve rod of hand wheel downside in proper order, the gland, the valve-stem nut outer wall passes through connecting rod and valve gap fixed connection, it has the packing to fill between gland bottom and the valve gap centre bore, be equipped with the spring between valve rod bottom and the valve clack. The utility model discloses a valve seals under the pressure of needs and opens and close, has avoided when the entrance pressure fluctuation is great, and the valve clack frequently opens and close the sealed face condition of wearing and tearing with higher speed that leads to, has improved the life of valve.

Description

Constant pressure stop check valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a constant pressure stop check valve.

Background

The stop check valve is a multi-purpose valve with the functions of both a stop valve and a check valve. The structure form is similar to that of a stop valve, but the valve rod is not fixedly connected with the valve clack. When the valve rod descends to press the valve clack on the valve seat, the valve rod plays a role of a stop valve; the valve rod acts as a check valve when lifted. The use of a stop check valve can save installation costs and space in a pipeline where both a stop valve (or gate valve) and a check valve need to be installed (such as an outlet end of a water pump), or in a place where the installation location is limited (such as a ship).

The existing stop check valve only has the functions of cutting off a medium and preventing the medium from flowing reversely, when the pressure fluctuation of an inlet is large, the valve clack is frequently opened and closed, a sealing surface is abraded in an accelerated manner, the service life of the valve is shortened, the valve clack is used for different media and combined with the use environment and the use condition of the different media, the pressure values of the valve clack fluctuation of the inlet are different, and the existing valve obviously has no targeted adjusting function.

Disclosure of Invention

According to the technical problem, the utility model provides a constant pressure stop check valve, including valve body, valve clack, spring, valve rod, sealing filler, valve gap, sealing filler gland, valve-stem nut, hand wheel, locking double-screw bolt, the valve body upside is equipped with the valve gap, the valve body is equipped with the screw through-hole respectively with the position that the valve gap corresponds, through passing the locking double-screw bolt through the valve body and the screw through-hole on the valve gap realize the fixed connection between valve gap and the valve body, locking nut has been revolved to the locking double-screw bolt tip;

the inside valve clack that is equipped with of valve body, install the valve rod in the valve clack, the valve rod upside is equipped with screw thread portion, the valve rod upwards passes the outside that the centre bore of seting up in advance on valve body, the valve gap extends to the valve gap, the valve rod top is equipped with the hand wheel, install valve-stem nut, gland packing in proper order on the valve rod of hand wheel downside, screw thread portion on valve-stem nut and the valve rod passes through screw-thread fit, the valve-stem nut outer wall passes through connecting rod and valve gap fixed connection, gland packing is filled between the centre bore of seting up in advance on the valve gap in its bottom and the valve gap, be equipped with the spring between valve rod bottom and the valve clack.

Furthermore, the valve further comprises a winding gasket, and the winding gasket is arranged between the end faces of the valve body and the valve cover which are matched.

The utility model has the advantages that: the utility model realizes the targeted adjustment of the valve under different pressures by arranging the spring and the valve rod nut, and when the medium pressure is more than the spring force, the valve is opened; when the medium pressure is less than the spring force, the valve is closed even if the inlet pressure fluctuates greatly. By rotating the hand wheel, the valve rod compresses or releases the spring to output different elastic forces, the valve is sealed and opened under the required pressure, the situation that the sealing surface is abraded at an accelerated speed due to frequent opening and closing of the valve clack when the inlet pressure fluctuation is large is avoided, the service life of the valve is prolonged, and the use scene of the valve is enlarged.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention.

As shown in the figure: 1-valve body, 2-valve clack, 3-spring, 4-valve rod, thread part-401, 5-winding gasket, 6-sealing filler, 7-valve cover, 8-sealing filler gland, 9-valve rod nut, 10-hand wheel, locking stud-11, locking nut-12 and connecting rod-13.

Detailed Description

Example 1:

according to the technical problem, the utility model provides a constant pressure stop check valve, including valve body 1, valve clack 2, spring 3, valve rod 4, gland packing 6, valve gap 7, gland packing 8, valve-rod nut 9, hand wheel 10, lock stud 11, valve body 1 upside is equipped with valve gap 7, the position that valve body 1 and valve gap 7 correspond is equipped with the screw through-hole respectively, through passing lock stud 11 through the screw through-hole on valve body 1 and the valve gap 7 and realizing the fixed connection between valve gap 7 and valve body 1, lock stud 11 tip has screwed lock nut 12;

1 inside valve clack 2 that is equipped with of valve body, install valve rod 4 in the

valve clack

2, 4 upsides of valve rod are equipped with screw thread portion 401, valve rod 4 upwards passes the outside that the centre bore of seting up in advance on valve body 1, the valve gap 7 extends to

valve gap

7, 4 tops of valve rod are equipped with hand wheel 10, install valve-stem nut 9, gland 8 on the valve rod 4 of hand wheel 10 downside in proper order, screw thread portion 401 on valve-stem nut 9 and the valve rod 4 passes through screw-thread fit, valve-stem nut 9 outer wall passes through connecting rod 13 and valve gap 7 fixed connection, gland 8 installs the centre bore of seting up in advance on valve gap 7, and it has gland 6 to fill between the centre bore of its bottom and valve gap 7, be equipped with spring 3 between valve rod 4 bottom and the valve clack 2.

Further, the valve further comprises a winding gasket 5, and the winding gasket 5 is arranged between the end faces of the valve body 1 and the valve cover 7 which are matched.

Example 2:

the valve body 1 and the valve cover 7 are screwed up through a locking stud and a locking nut with full threads, and the sealing is realized when the valve body and the valve cover act on the wound gasket 5. The packing gland 8 compresses the packing 6 by applying a force to the packing 6 to deform the packing 6, thereby sealing the valve rod 4.

When valve inlet pressure is required to be opened at a certain pressure value, the valve clack 2 is prevented from being opened and closed frequently along with fluctuation of the inlet pressure, the valve rod 4 can be driven to rotate through the rotary hand wheel 10, the valve rod 4 is converted into lifting action through rotary action under the action of the valve rod nut 9, the hand wheel 10 is rotated clockwise, the valve rod 4 descends, the compression spring 3 is applied to the valve clack 2, the spring 3 is applied to the valve clack 2, and the spring 3 is applied to the valve body 1 to achieve sealing. When the medium pressure is larger than the elastic force of the spring 3, the valve is opened; when the medium pressure is less than the spring force of the spring 3, the valve is closed even if the inlet pressure fluctuates greatly. By rotating the hand wheel 10, the valve rod 4 compresses or releases the spring 3 to output different elastic forces, so that the valve can be opened and closed in a sealing way under the required pressure.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A constant-pressure stop check valve is characterized by comprising a valve body, a valve clack, a spring, a valve rod, sealing filler, a valve cover, a sealing filler gland, a valve rod nut, a hand wheel and a locking stud, wherein the valve cover is arranged on the upper side of the valve body;

2. The constant-pressure stop check valve as recited in claim 1, further comprising a convoluted gasket disposed between the mating end surfaces of the valve body and the valve cover.