CN213655827U - Stop check valve - Google Patents

Abstract

The utility model provides a stop check valve belongs to valve technical field. It has solved current check valve and has leaded to life to reduce scheduling problem because of sealed pad takes place the damage easily. This stop check valve, which comprises a valve body, valve rod and case, the upper end fixedly connected with hand wheel of valve rod, the guiding hole has been seted up on the lower terminal surface of valve rod, the case up end has convex guide bar, the guide bar inserts in the guiding hole, be fixed with sealed the pad on the case lower extreme, the outer department of following of terminal surface has convex bulge loop under the case, the center department of terminal surface has convex projection under the case, lie in on the case lower extreme and form the mounting groove between bulge loop and the projection, sealed the embedding mounting groove, be provided with the step on the lateral surface of projection, the below cover that lies in sealed the pad on the projection is equipped with the gasket, the projection lower extreme stretches out the gasket and the riveting turns up and forms the turn-ups, the gasket axial is spacing between step and turn-ups, sealed lower terminal. The stop check valve has the advantage of prolonging the service life.

Description

Stop check valve

Technical Field

The utility model belongs to the technical field of the valve, a stop check valve is related to.

Background

The valve is used for controlling the medium in the pipeline and is a mechanical product with a movable mechanism. The valve can be divided into gate valve, stop valve, throttle valve, ball valve, butterfly valve, plug valve and check valve, the stop valve is the valve whose opening and closing piece (valve clack) is driven by valve rod and makes straight lifting movement along the axis of valve seat (sealing surface). The check valve is a valve which can automatically prevent the medium from flowing backwards by the action of the medium through an opening and closing piece (valve clack). The stop check valve is a check valve with the function of a stop valve.

As disclosed in chinese patent literature, a check valve is proposed [ application No.: CN 200420081950.3; the notice number is: CN2720204Y ], including the valve body, is controlled by the adjusting hand wheel to move along its axial valve stem and valve flap, the valve flap and valve stem separate body set up, set up a valve port corresponding to valve stem between medium inlet and medium outlet of the valve body, the valve flap relies on its dead weight to block the valve port, is fixed with the gasket on the valve flap. Fluid medium enters the medium inlet under certain pressure, the valve clack is pushed away from the valve port, and the fluid medium flows through the valve port and flows out of the medium outlet. When the pressure of the medium outlet is larger than that of the medium inlet, the fluid medium exerts a pressure for sealing the valve port on the valve clack, the fluid medium is prevented from flowing back, and the check function is realized. The regulating hand wheel makes the valve rod move downwards, and the inner end of the valve rod is pressed against the valve clack to make the valve clack block the valve port and make the valve in cut-off state.

The lower end of the valve clack is provided with an upper baffle plate and a lower convex ring, a clamping groove is formed between the upper baffle plate and the lower convex ring, the sealing gasket is embedded into the clamping groove, the sealing gasket needs to be pressed into the clamping groove from the lower convex ring during assembly, and the sealing gasket is extruded by the lower convex ring during pressing, so that the inner side part of the sealing gasket is easy to damage, the sealing gasket is easy to fall off during the use of the stop check valve, and the normal use of the stop check valve is influenced; in addition, when the stop check valve needs to be in a stop state, the hand wheel rotates to enable the valve rod to move downwards, the sealing gasket abuts against the valve port, the outer side portion of the sealing gasket is squeezed by the upper baffle and the valve port, if the hand wheel is screwed down and the force is too large to enable the valve rod to move downwards, the squeezing of the outer side portion of the sealing gasket is easy to exceed the limit and damage occurs, the sealing gasket cannot be sealed in subsequent use, namely, the non-return and stop functions cannot be realized, and therefore the service life of the stop check valve is shortened.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a stop check valve, solved current stop check valve because of sealed the technical problem that takes place the damage easily and lead to life to reduce.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a stop check valve, includes valve body, valve rod and case, be provided with inlet opening and apopore on the valve body, it is provided with the disk seat to lie in between inlet opening and the apopore in the valve body, set up the valve opening that communicates inlet opening and apopore on the disk seat, the upper end fixedly connected with valve cap of valve body, valve rod threaded connection is on the valve cap and can the oscilaltion, the upper end of valve rod stretches out valve cap and fixedly connected with hand wheel, the guiding hole has been seted up on the lower terminal surface of valve rod, the center department of case up end has convex guide bar, the guide bar inserts in the guide hole, be fixed with sealed the pad on the case lower extreme, be connected with the spring between case and the valve cap, under the effect of spring the lower terminal surface of sealed pad supports and leans on the disk seat and seals the valve opening, its characterized in that, the outer, the valve core is characterized in that a convex column is arranged at the center of the lower end face of the valve core, a mounting groove is formed between the convex ring and the convex column on the lower end of the valve core, the sealing gasket is embedded into the mounting groove, a step is arranged on the outer side face of the convex column, a gasket is sleeved below the sealing gasket on the convex column, the lower end of the convex column extends out of the gasket and is riveted and turned outwards to form a turned edge, the gasket is axially limited between the step and the turned edge, and the lower end face of the sealing gasket is abutted against the gasket.

When the sealing gasket is assembled, the sealing gasket is placed in the mounting groove, then the gasket is sleeved on the convex column, and the lower end of the convex column is riveted to form a flanging. In the in-process of the equipment of sealed pad, sealed pad is installed in the mounting groove before the turn-ups forms, not with turn-ups contact extrusion, the sealed inside portion of filling up has been avoided receiving the extrusion and takes place the damage, the gasket plays the guard action to sealed pad in the equipment process simultaneously, avoid riveting in-process to lead to the fact destruction to sealed pad, and the gasket plays to sealed pad after the equipment is accomplished and supports limiting displacement, avoid sealed pad to deviate from the projection, and the setting of projection upper step has carried out ascending axial spacingly to the gasket, avoid riveting in-process too much sealed inside portion of the sealed pad of extrusion to cause sealed pad to take place the damage. When the stop check valve needs to be in a stop state in the use process, the hand wheel rotates to enable the valve rod to move downwards, the valve rod abuts against the valve core to enable the sealing gasket to be tightly pressed on the valve seat to seal the valve hole, in the downward movement process of the valve rod, when the convex ring abuts against the valve seat, the valve core and the valve rod cannot move downwards any more, the convex ring on the valve core has limiting and protecting effects on the sealing gasket, and the sealing gasket is prevented from being damaged due to limit deformation. Therefore, the stop check valve can reduce the possibility of breakage of the sealing gasket, thereby prolonging the service life of the stop check valve.

In the stop check valve, the lower end face of the convex column is provided with a fabrication hole, and the flanging is formed by riveting, pressing and turning outwards the wall of the lower end hole of the fabrication hole. The arrangement of the fabrication hole facilitates the formation of the flanging, thereby facilitating the assembly of the sealing gasket.

In the above-mentioned stop check valve, the spring is sleeved outside the valve rod, the lower end surface of the valve cap is provided with the positioning groove, the bottom surface of the positioning groove is provided with the convex positioning column, the upper end of the spring is sleeved outside the positioning column and is embedded into the positioning groove, the outer edge of the upper end surface of the valve core is provided with the concave notch, and the lower end of the spring is embedded into the notch. The spring is positioned through the positioning column, the positioning groove and the notch, so that the spring is prevented from shifting in the telescopic process, and the use stability of the stop check valve is ensured.

In the above-mentioned stop check valve, the lower end of the sealing gasket protrudes out of the lower end surface of the convex ring, and the axial thickness of the part of the sealing gasket protruding out of the convex ring is less than or equal to one third of the axial thickness of the sealing gasket. Thereby sealed lower extreme that fills up the protruding collar of sealed pad makes can be by the sealed effect between improvement sealed pad and the disk seat of being extruded, limits the axial thickness of sealed protruding collar department again simultaneously, guarantees sealed pad and can not take place the limit extrusion and damage, has guaranteed sealed life who fills up.

In the stop check valve, mounting gaps are arranged between the outer side surface of the sealing gasket and the inner side surface of the convex ring and between the inner side surface of the sealing gasket and the outer side surface of the convex column. Installation clearance set up conveniently with sealed the pad embedding mounting groove in, also can avoid sealed the pad to produce frictional wear between the in-process of embedding the mounting groove and bulge loop or projection simultaneously, guarantee sealed life who fills up.

In the above-mentioned check valve, a movable gap is provided between the inner side surface of the spacer and the outer side surface of the boss. The arrangement of the movable gap facilitates the gasket to be sleeved on the convex column, so that the sealing gasket is convenient to assemble.

Compared with the prior art, the utility model has the advantages of it is following:

set up bulge loop and projection on the lower terminal surface of case, form the mounting groove between bulge loop and the projection, sealed the pad embedding is provided with the step on the lateral surface of projection in the mounting groove, and the gasket suit is on the projection, and the projection lower extreme riveting is turned up and is formed the turn-ups, and the gasket axial is spacing between step and turn-ups, has reduced sealed the pad and has taken place damaged possibility, has improved the life who ends the check valve. The arrangement of the fabrication holes facilitates the formation of the flanging. The installation clearance and the movable clearance are arranged to facilitate the assembly of the sealing gasket. The arrangement of the positioning groove, the positioning column and the notch enables the spring to be stably installed.

Drawings

FIG. 1 is a cross-sectional view of the present check valve;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a cross-sectional view of the present non-return valve in which the valve body is not caulked.

In the figure, 1, a valve body; 1a, a water inlet hole; 1b, water outlet holes; 1c, a valve seat; 1d, valve hole; 2. a valve stem; 2a, a guide hole; 3. a valve core; 3a, a guide rod; 3b, a notch; 3c, a convex ring; 3d, convex columns; 3d1, step; 3d2 and flanging; 3d3, fabrication hole; 3e, mounting grooves; 4. a bonnet; 4a, a positioning groove; 4b, a positioning column; 5. a hand wheel; 6. a gasket; 7. a spring; 8. a mounting gap; 9. a gasket; 10. a movable gap.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-3, a stop check valve comprises a valve body 1, a valve rod 2 and a valve core 3, wherein a water inlet hole 1a is formed in the right side surface of the valve body 1, a water outlet hole 1b is formed in the left side surface of the valve body 1, a valve seat 1c is arranged between the water inlet hole 1a and the water outlet hole 1b in the valve body 1, and a valve hole 1d communicated with the water inlet hole 1a and the water outlet hole 1b is formed in the valve seat 1 c. Valve rod 2 is located disk seat 1 c's top, and the upper end fixedly connected with valve cap 4 of valve body 1, 2 threaded connection of valve rod are on valve cap 4 and can the oscilaltion. The upper end of the valve rod 2 extends out of the valve cap 4 and is fixedly connected with a hand wheel 5, a guide hole 2a is formed in the lower end face of the valve rod 2, a convex guide rod 3a is arranged at the center of the upper end face of the valve core 3, the guide rod 3a is inserted into the guide hole 2a, and the guide rod 3a can slide up and down in the guide hole 2 a. A sealing gasket 6 is fixed on the lower end of the valve core 3, a spring 7 is connected between the valve core 3 and the valve cap 4, and the lower end surface of the sealing gasket 6 is abutted against the valve seat 1c under the action of the spring 7 to seal the valve hole 1 d. The junction of valve cap 4 and valve body 1 scribbles the anaerobism and glues, guarantees the leakproofness between valve cap 4 and the valve body 1.

The spring 7 is sleeved on the outer side of the lower end of the valve rod 2, the positioning groove 4a is formed in the lower end face of the valve cap 4, the bottom face of the positioning groove 4a is provided with a convex positioning column 4b, the upper end of the spring 7 is sleeved on the outer side of the positioning column 4b and is embedded into the positioning groove 4a, the outer edge of the upper end face of the valve core 3 is provided with a concave notch 3b, and the lower end of the spring 7 is embedded into the notch 3 b. The outer edge of the lower end face of the valve core 3 is provided with a convex ring 3c, the center of the lower end face of the valve core 3 is provided with a convex column 3d, the lower end of the valve core 3 is positioned between the convex ring 3c and the convex column 3d to form a mounting groove 3e, and the sealing gasket 6 is embedded into the mounting groove 3 e. Mounting gaps 8 are arranged between the outer side surface of the sealing gasket 6 and the inner side surface of the convex ring 3c and between the inner side surface of the sealing gasket 6 and the outer side surface of the convex column 3 d. The lower end of the sealing gasket 6 protrudes out of the lower end surface of the convex ring 3c, and the axial thickness of the sealing gasket 6 protruding out of the convex ring 3c is less than or equal to one third of the axial thickness of the sealing gasket 6, for example, the axial thickness of the sealing gasket 6 is 3mm, and the axial thickness of the sealing gasket 6 protruding out of the convex ring 3c can be 1mm, 0.8mm, 0.6mm, 0.4mm, and the like. The outer side surface of the convex column 3d is provided with a step 3d1, the distance between the lower end surface of the step 3d1 and the bottom surface of the mounting groove 3e is slightly smaller than the axial thickness of the sealing gasket 6, for example, the axial thickness of the sealing gasket 6 is 3mm, and the distance between the lower end surface of the step 3d1 and the bottom surface of the mounting groove 3e is 2.7mm-2.9mm, preferably 2.8 mm. The convex column 3d is sleeved with a gasket 9 below the sealing gasket 6, the lower end of the convex column 3d extends out of the gasket 9 and is riveted and turned outwards to form a flange 3d2, the gasket 9 is axially limited between the step 3d1 and the flange 3d2, and the lower end face of the sealing gasket 6 abuts against the gasket 9. A movable gap 10 is arranged between the inner side surface of the gasket 9 and the outer side surface of the convex column 3 d. The lower end face of the convex column 3d is provided with a fabrication hole 3d3, and the flanging 3d2 is formed by riveting, pressing and turning outwards the lower end hole wall of the fabrication hole 3d 3. The gasket 9 may be made of metal, such as copper or stainless steel, or rigid plastic, such as POM, ABS, etc.

When the sealing gasket 6 is assembled, the sealing gasket 6 is placed in the mounting groove 3e, then the gasket 9 is sleeved on the convex column 3d, and the lower end of the convex column 3d is riveted to form a flange 3d 2. In the in-process of the equipment of sealed 6, sealed 6 install mounting groove 3e before turn-ups 3d2 forms in sealed, do not contact the extrusion with turn-ups 3d2, the inside portion of having avoided sealed 6 of filling up receives the extrusion and takes place the damage, simultaneously gasket 9 plays the guard action to sealed 6 in the equipment process, avoid the riveting in-process to lead to the fact destruction to sealed 6, and gasket 9 plays to seal 6 after the equipment is accomplished and supports limiting displacement, avoid sealed 6 to deviate from on the projection 3d, and the setting of step 3d1 has carried out ascending axial spacingly to gasket 9 on the projection 3d, the inside portion of avoiding the too much sealed 6 of the sealed pad of extrusion of gasket 9 of riveting in-process causes sealed 6 to take place the damage. When the stop check valve needs to be in a stop state in the use process, the hand wheel 5 rotates to enable the valve rod 2 to move downwards, the valve rod 2 abuts against the valve core 3 to enable the sealing gasket 6 to be tightly pressed on the valve seat 1c to seal the valve hole 1d, in the downward movement process of the valve rod 2, when the convex ring 3c abuts against the valve seat 1c, the valve core 3 and the valve rod 2 cannot move downwards any more, the convex ring 3c on the valve core 3 has limiting and protecting effects on the sealing gasket 6, and the sealing gasket 6 is prevented from being damaged due to limit deformation. Therefore, the stop check valve can reduce the possibility of breakage of the gasket 6, thereby prolonging the service life of the stop check valve.

In addition, the sealing gasket 6 can be completely embedded into the mounting groove 3e, a protruding sealing ring is arranged on the upper end face of the valve seat 1c, the sealing ring and the sealing gasket 6 abut against each other to form sealing, and accordingly the axial height of the sealing ring is less than or equal to one third of the axial thickness of the density gasket.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. The utility model provides a stop check valve, includes valve body (1), valve rod (2) and case (3), be provided with inlet opening (1a) and apopore (1b) on valve body (1), be located and be provided with disk seat (1c) between inlet opening (1a) and apopore (1b) in valve body (1), set up valve opening (1d) that communicate inlet opening (1a) and apopore (1b) on disk seat (1c), the upper end fixedly connected with valve cap (4) of valve body (1), valve rod (2) threaded connection is on valve cap (4) and can the oscilaltion, valve cap (4) and fixedly connected with hand wheel (5) are stretched out to the upper end of valve rod (2), guiding hole (2a) have been seted up on the lower terminal surface of valve rod (2), the center department of case (3) up end has convex guide bar (3a), the guide rod (3a) is inserted into the guide hole (2a), a sealing gasket (6) is fixed on the lower end of the valve core (3), a spring (7) is connected between the valve core (3) and the valve cap (4), the lower end face of the sealing gasket (6) is abutted against a valve seat (1c) to seal a valve hole (1d) under the action of the spring (7), the valve is characterized in that a convex ring (3c) is arranged at the outer edge of the lower end face of the valve core (3), a convex column (3d) is arranged at the center of the lower end face of the valve core (3), a mounting groove (3e) is formed between the convex ring (3c) and the convex column (3d) on the lower end of the valve core (3), the sealing gasket (6) is embedded into the mounting groove (3e), a step (3d1) is arranged on the outer side face of the convex column (3d), and a gasket (9) is sleeved on the convex column (3d) below the sealing gasket (, the lower end of the convex column (3d) extends out of the gasket (9) and is riveted and turned outwards to form a flange (3d2), the gasket (9) is axially limited between the step (3d1) and the flange (3d2), and the lower end face of the sealing gasket (6) abuts against the gasket (9).

2. The stop check valve according to claim 1, wherein the lower end surface of the convex column (3d) is provided with a fabrication hole (3d3), and the flanging (3d2) is formed by riveting, pressing and turning outwards the lower end wall of the fabrication hole (3d 3).

3. The stop check valve according to claim 1, wherein the spring (7) is sleeved outside the valve rod (2), a positioning groove (4a) is arranged on the lower end face of the valve cap (4), a convex positioning column (4b) is arranged on the bottom surface of the positioning groove (4a), the upper end of the spring (7) is sleeved outside the positioning column (4b) and is embedded in the positioning groove (4a), a concave notch (3b) is arranged at the outer edge of the upper end face of the valve core (3), and the lower end of the spring (7) is embedded in the notch (3 b).

4. The non-return stop valve according to any of claims 1 to 3, characterized in that the lower end of the gasket (6) protrudes beyond the lower end face of the collar (3c) and the axial thickness of the gasket (6) beyond the collar (3c) is less than or equal to one third of the axial thickness of the gasket (6).

5. The non-return stop valve according to any of claims 1 to 3, characterized in that mounting gaps (8) are provided between the outer side of the sealing gasket (6) and the inner side of the collar (3c) and between the inner side of the sealing gasket (6) and the outer side of the stud (3 d).

6. Stop-and-check valve according to any of claims 1 to 3, characterized in that a clearance gap (10) is provided between the inner side of the washer (9) and the outer side of the stud (3 d).

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