CN220337546U - Opposite-clamping type check valve - Google Patents

Abstract

The utility model discloses a butt-clamping type check valve, relates to the field of check valves, and aims to reduce the influence of uneven fluid pressure on the check valve. The valve seat is mounted in the valve body and is in sealing fit with the valve clack, the spring is sleeved outside the valve rod, the bottom surface of the valve clack, which is in contact with the valve seat, is in a spherical shape protruding towards the direction of the valve seat, and the valve clack is hinged with the valve rod. The valve clack is on the valve rod can wind the structure mode of articulated department wobbling, and the valve clack can swing in a flexible way, and when the valve clack receives inhomogeneous fluid pressure, the valve clack atress of sphere form swings to adapt to this kind of pressure environment, and the valve clack has certain guiding effect to the fluid, reduces fluidic disturbance, makes pressure distribution trend even, reduces the influence of medium pressure inequality to the valve opening and close, reduces the part impaired, and life is longer.

Description

Opposite-clamping type check valve

Technical Field

The utility model relates to the field of check valves, in particular to a butt-clamping type check valve.

Background

Check valves are a common mechanical component and are widely used in various systems, such as water lines, air lines, hydraulic systems, etc. The device mainly plays a role in preventing the reverse flow of the fluid and ensures the stable operation of the system. However, the non-return valve may be in use with uneven pressure in the fluid in the conduit, which may have some disadvantages and adverse effects. First, non-uniform check valve pressure can cause the valve to fail to close properly. When fluid pressure acts on the valve clack, uneven pressure can cause overlarge contact friction force between the valve rod and the valve body, uneven stress on the valve clack is inclined, opening and closing are difficult, and particularly, the valve clack of the opposite-clamping type check valve is generally flat-plate-shaped (for example, chinese patent publication No. CN204942636U and a vertical check valve) and is more easy to occur. Secondly, the stress to which the components of the check valve are subjected may be uneven due to uneven distribution of pressure, which may lead to fatigue damage of the components, and uneven pressure may also lead to shortened valve life.

Disclosure of Invention

The purpose of the utility model is that: in order to solve the problem caused by uneven pressure of the check valve, the utility model provides a butt-clamping type check valve, which reduces the influence of uneven fluid pressure on the check valve.

The technical scheme of the utility model is as follows: the valve seat is mounted in the valve body and is in sealing fit with the valve clack, the spring is sleeved outside the valve rod, the bottom surface of the valve clack, which is in contact with the valve seat, is in a spherical shape protruding towards the direction of the valve seat, and the valve clack is hinged with the valve rod.

By adopting the technical scheme, the valve clack is arranged on the valve rod in a structure mode of swinging around the hinging position, the valve clack can swing flexibly, when the valve clack is subjected to uneven fluid pressure, the spherical valve clack is stressed to swing so as to adapt to the pressure environment, the valve clack has a certain guiding effect on the fluid, the disturbance of the fluid is reduced, the pressure distribution tends to be even, the influence of uneven medium pressure on the opening and closing of the valve is reduced, the damage of parts is reduced, and the service life is longer.

In one possible design, the bottom surface of the valve flap is provided with a ring projection, which is located at the outer edge of the sealing surface formed by the valve flap and the valve seat, and which can rest against the top surface of the valve seat.

By adopting the design, when the valve clack descends to be closed, even if the valve clack is stressed to swing and tilt, the ring bulge can also prop against the top surface of the valve seat, so that the valve clack is gradually adjusted to swing back to a normal state, and the valve clack has the function of automatically adjusting the valve clack.

In one possible design, the end of the valve stem is provided with lugs, through which the valve flaps are hinged radially by a pin.

By adopting the design, the valve clack can swing around the pin shaft, the processing difficulty is low, and the assembly is convenient.

In one possible design, the valve rod is fixedly connected with a fixed support, a thrust bearing is arranged in the fixed support, one end of the spring is propped against the thrust bearing, and the other end of the spring is propped against the guide sleeve.

By adopting the design, the valve rod can rotate under the force, the swinging direction of the valve clack is enlarged, and the adaptability is improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view showing the structure of the valve in the open state according to the embodiment of the present utility model;

FIG. 3 is an enlarged view of a portion of the utility model at A in FIG. 1;

wherein, 1, valve clack; 2. a valve stem; 3. a valve body; 4. a valve seat; 5. a guide sleeve; 6. a spring; 11. a ring protrusion; 21. a lug; 12. a pin shaft; 22. a fixed bracket; 23. a thrust bearing.

Description of the embodiments

The utility model provides a butt clamp formula check valve as shown in fig. 1, fig. 2, including valve clack 1, valve rod 2, valve body 3, disk seat 4, uide bushing 5 and spring 6, uide bushing 5 is fixed in on the valve body 3, valve rod 2 activity runs through uide bushing 5 and the bottom and the valve clack 1 hinged joint of valve rod 2, disk seat 4 install in valve body 3 and with valve clack 1 sealing fit, spring 6 overcoat is outside valve rod 2, with the contact of disk seat 4 the valve clack 1 bottom is the sphere that rises to disk seat 4 direction. When fluid is applied to the valve clack 1, the valve clack 1 is stressed to rise, if the fluid pressure is unbalanced, the valve clack 1 swings to one side, and the bottom surface of the valve clack 1, which is in contact with the fluid, is spherical, so that the fluid can be guided to be uniformly dispersed, the influence caused by turbulence is reduced, and the normal operation of the check valve is facilitated.

The bottom surface of the valve clack 1 is provided with a ring bulge 11, the ring bulge 11 is positioned at the outer edge of a sealing surface formed by the valve clack 1 and the valve seat 4, and the ring bulge 11 can be abutted against the top surface of the valve seat 4. When the valve clack 1 descends to close, even if the valve clack 1 swings under force and lifts, the ring protrusion 11 can be propped against the top surface of the valve seat 4, and the valve clack 1 is gradually adjusted to swing back to an initial state along with the descending of the valve rod 2 until sealing is formed with the valve seat 4.

The end of the valve rod 2 is provided with a lug 21, and the valve flap 1 is hinged by a pin 12 passing radially through the lug 21.

As shown in fig. 3, the valve rod 2 is fixedly connected with a fixed support 22, a thrust bearing 23 is installed in the fixed support 22, one end of the spring 6 is propped against the thrust bearing 23, and the other end is propped against the guide sleeve 5, so that the valve rod 2 and the spring 6 rotate relatively. Because the actual fluid pressure is in multi-direction uneven, for example, one side of the pin shaft 12 in the radial direction is stressed greatly, the valve rod 2 is stressed and rotated to drive the valve clack 1 to rotate, so that the valve clack 1 is tilted in the direction of being stressed greatly gradually. Therefore, the swing direction of the valve clack 1 can be multidirectional, and the adaptability is higher.

Claims (4)

1. The utility model provides a butt clamp vertical check valve, is including valve clack, valve rod, valve body, disk seat, uide bushing and spring, the uide bushing is fixed in on the valve body, the valve rod activity runs through the uide bushing and is connected with the valve clack, the disk seat is installed in the valve body and with the sealed cooperation of valve clack, the spring overcoat is outside the valve rod, its characterized in that: the bottom surface of the valve clack contacted with the valve seat is in a spherical surface shape protruding towards the direction of the valve seat, and the valve clack is hinged with the valve rod.

2. The butt-clip check valve of claim 1, wherein: the bottom surface of valve clack is provided with the ring protrusion, the ring protrusion is located the sealed face outer fringe position that valve clack and disk seat formed, the ring protrusion can support on the top surface of disk seat.

3. The butt-clip check valve according to claim 1 or 2, wherein: the end part of the valve rod is provided with a lug, and the valve clack radially penetrates through the lug through a pin shaft to form hinge connection.

4. The butt-clip check valve according to claim 1 or 2, wherein: the valve rod is fixedly connected with a fixed support outside, a thrust bearing is arranged in the fixed support, one end of the spring is propped against the thrust bearing, and the other end of the spring is propped against the guide sleeve.