CN210978645U

CN210978645U - Check valve

Info

Publication number: CN210978645U
Application number: CN201922047921.4U
Authority: CN
Inventors: 王忠诚; 田各; 胡高祯; 黄鑫; 季匡红
Original assignee: Zhejiang Valogin Technology Co ltd
Current assignee: Zhejiang Valogin Technology Co ltd
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-07-10
Anticipated expiration: 2029-11-23

Abstract

The utility model provides a check valve belongs to valve technical field. The check valve solves the problems that the existing check valve can only be connected with a pipe fitting with a single specification, so that the check valve is inconvenient to install and connect on a pipeline and the like. The check valve comprises a valve body and a valve core, wherein a first guide seat, a second guide seat and a sealing seat are arranged on the inner wall of the valve body, the valve core comprises a valve rod, a sealing gasket is fixed on the valve rod, a spring is arranged between the valve core and the first guide seat, the spring acts on the valve core to enable the sealing gasket to be abutted against the sealing seat and form sealing, pipe joints are fixedly connected to two ends of the valve body, a convex baffle ring is arranged on the inner side face of each pipe joint and close to the valve body, at least one step face is arranged on the outer side of each baffle ring on the inner side face of each pipe joint, installation sections with different apertures are formed on two sides of each step face on each pipe joint, and annular cutting grooves are formed in. The check valve has the advantages of convenient installation and connection on pipelines and the like.

Description

Check valve

Technical Field

The utility model belongs to the technical field of the valve, a 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 check valve is a valve that can automatically stop the medium from flowing backwards by the medium acting force of the opening and closing piece (valve clack).

Chinese patent literature discloses a hot melt connection type check valve, the application number: cn201721424071. x; the notice number is: CN 207750543U ], including plastics main part and the function inserts of cooperation setting in plastics main part, the function inserts includes the shell, set up the axostylus axostyle in the shell and set up the shutoff board on the axostylus axostyle, the cover is equipped with the spring on the axostylus axostyle, the spacing cooperation of spring one end and shell, other end extrusion shutoff board for spacing sealed cooperation between shutoff board and the shell, plastics main part both ends are equipped with the spigot joint respectively, and it through the spigot joint respectively with external pipe fitting cooperation fixed connection.

However, the size of the aperture of the mounting hole on the socket joint is a fixed value, and the mounting hole needs to be matched with the outer diameter value of the external pipe fitting, so that the check valve cannot be fixedly inserted into the external pipe fitting due to the fact that the specification is selected by a customer when the customer purchases the check valve, and the check valve is inconvenient to mount and connect on a pipeline. In the face of such a situation, the common treatment method is to select the check valve or the external pipe again, and the time is required for selecting the external pipe again after returning, which results in a prolonged construction period and an increased time cost.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a check valve, thereby solved current check valve can only lead to the inconvenient technical problem of check valve erection joint on the pipeline with single specification pipe connection.

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

a check valve comprises a valve body and a valve core, wherein a first guide seat and a second guide seat are arranged on the inner wall of the valve body, a sealing seat is arranged on the inner wall of the valve body between the first guide seat and the second guide seat, the valve core comprises a valve rod, two ends of the valve rod are respectively inserted on the first guide seat and the second guide seat, a sealing gasket arranged between the first guide seat and the sealing seat is fixed on the valve rod, a spring is arranged between the valve core and the first guide seat, the spring acts on the valve core to enable the sealing gasket to abut against the sealing seat and form sealing, pipe joints are fixedly connected with two ends of the valve body, a convex baffle ring is arranged on the inner side surface of each pipe joint close to the valve body, the check valve is characterized in that at least one step surface is arranged on the outer side of the baffle ring on the inner side surface of each pipe joint, and installation sections with different apertures are formed on two, and an annular cutting groove is formed in the outer side surface of the pipe joint corresponding to the step surface.

When the check valve is used, one corresponding installation section is selected according to the pipe fitting specification of a construction site. When suitable installation section is located the outside of coupling, need not cut, directly insert the pipe fitting and carry out fixed connection in the coupling, the terminal surface of pipe fitting supports and carries out axial positioning on leaning on the step face that corresponds during the grafting. When the selected installation section is positioned on the inner side, cutting off redundant installation sections, cutting from the cutting groove during cutting, inserting the pipe fitting into the pipe joint for fixed connection, and axially positioning the end face of the pipe fitting against the corresponding step face during insertion; when the installation section is located at the innermost side, the end face of the pipe fitting abuts against the baffle ring to be axially positioned. This check valve makes the coupling have the different installation section in a plurality of apertures through set up the step face on the coupling, and the different installation section in a plurality of apertures can correspond the pipe fitting of installing multiple specification, makes the pipe fitting that the check valve can adapt to multiple specification install to make check valve erection joint convenient on the pipeline. And set up on the pipe joint and cut the groove, sign and injecing the cutting part, guarantee to cut and target in place, make check valve erection joint convenient on the pipeline.

In the check valve, an aperture value corresponding to the aperture of the mounting section is arranged on the outer side surface of each mounting section. The setting of aperture value makes things convenient for constructor to confirm the installation section that needs, makes the check valve erection joint convenient on the pipeline.

In the check valve, cutting marks are arranged on the outer side surface of the pipe joint and positioned on two sides of the cutting groove. The cutting marks are convenient for constructors to determine the positions of the cutting grooves, so that the check valve is convenient to install and connect on the pipeline.

In the check valve, the pipe joint is detachably and fixedly connected to the valve body. The pipe joint is fixedly connected with the valve body in a detachable mode, when the hole diameter of the installation section on the pipe joint cannot be connected with a pipe fitting or the position of the installation section on the pipe joint is cut in a staggered mode, the pipe joint can be replaced with a new pipe joint after being detached, the check valve is convenient to install and connect on a pipeline, meanwhile, the replacement of the whole check valve is avoided, and the cost is reduced.

In foretell check valve, be connected with the locking cap between coupling and the valve body, the one end suit of locking cap on the valve body and with valve body threaded connection, convex holding ring has on the medial surface of the locking cap other end, it has convex fender edge to be close to valve body department on the lateral surface of coupling, keep off along being located between holding ring and the valve body, the holding ring supports and leans on keeping off along.

When the pipe joint is connected with the valve body, the locking cap is firstly sleeved on the pipe joint, then the inner end face of the pipe joint is abutted against the end face of the valve body, then the locking cap is sleeved on the valve body and screwed, and after screwing, the positioning ring is abutted against the blocking edge, so that the pipe joint is fixedly connected with the valve body. The detachable fixed connection between the pipe joint and the valve body is realized through the locking cap, and the check valve is convenient to install and connect on a pipeline.

In the above check valve, the pipe joint is made of PPR material. PPR material and PPR pipe can be connected through the hot melt, make check valve erection joint convenient on the pipeline.

In foretell check valve, the case still includes stagnant water board and clamp plate, stagnant water board suit is fixed on the valve rod and with the valve rod tight fit, convex solid fixed ring has on the stagnant water board towards the one side of guide holder one, sealed pad and clamp plate suit are on solid fixed ring, and sealed the pad is located between stagnant water board and the clamp plate, the tip that is close to guide holder one on the solid fixed ring is outwards turned over and is rolled over and form the clamping ring, the clamping ring supports and leans on in the one side of clamp plate towards guide holder one.

The pressing plate and the water stop plate are used for compressing and fixing the sealing gasket through the pressing ring, so that the possibility of leakage at the joint between the sealing gasket and the water stop plate and the joint between the sealing gasket and the pressing plate is reduced, and the use of the check valve is stable.

In the check valve, a convex annular water stop convex ring is arranged on one surface of the sealing gasket, which is abutted against the pressure plate. The arrangement of the water stop convex ring improves the sealing performance between the sealing gasket and the pressing plate, reduces the possibility of water leakage between the sealing gasket and the pressing plate, and enables the use of the check valve to be stable.

In the check valve described above, a seal ring is provided between the pipe joint and the valve body. The sealing ring has a sealing function, prevents the joint of the pipe joint and the valve body from leaking, and enables the check valve to be used stably.

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

the inner side surface of the pipe joint is provided with at least one step surface, the two sides of the step surface on the pipe joint form installation sections with different apertures, and the cutting groove is arranged at the position corresponding to the step surface on the outer side surface of the pipe joint, so that the check valve can be suitable for connecting a plurality of pipe fittings with different specifications, and the check valve is convenient to install and connect on pipelines. Set up aperture value and cutting sign on the lateral surface of coupling, further make this check valve erection joint convenient on the pipeline. The pressing plate and the water stop plate are used for pressing and fixing the sealing gasket through the pressing ring, the sealing performance of the sealing gasket is guaranteed, and the check valve is stable to use.

Drawings

FIG. 1 is a perspective view of the present check valve;

fig. 2 is a cross-sectional view of the present check valve.

In the figure, 1, a valve body; 1a, a first guide seat; 1b, a second guide seat; 1c, a seal seat; 2. a valve core; 2a, a valve rod; 2b, a sealing gasket; 2b1, a water stop convex ring; 2c, a water stop plate; 2c1, a fixed ring; 2c2, a pressure ring; 2d, pressing a plate; 3. a spring; 4. a pipe joint; 4a, a baffle ring; 4b, step surfaces; 4c, an installation section; 4d, cutting grooves; 4e, aperture value; 4f, cutting identification; 4g, blocking edges; 5. a lock cap; 5a, a positioning ring; 6. and (5) sealing rings.

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 and 2, a check valve includes a valve body 1 and a valve spool 2, and the valve spool 2 is installed in the valve body 1. The inner wall of the valve body 1 is provided with a first guide seat 1a and a second guide seat 1b, a sealing seat 1c is arranged between the first guide seat 1a and the second guide seat 1b on the inner wall of the valve body 1, and water holes are formed in the first guide seat 1a and the second guide seat 1 b. The valve core 2 comprises a valve rod 2a, two ends of the valve rod 2a are respectively inserted on the first guide seat 1a and the second guide seat 1b, a sealing gasket 2b positioned between the first guide seat 1a and the sealing seat 1c is fixed on the valve rod 2a, a spring 3 is arranged between the valve core 2 and the first guide seat 1a, and the spring 3 acts on the valve core 2 to enable the sealing gasket 2b to abut against the sealing seat 1c and form sealing. The valve core 2 further comprises a water stop plate 2c and a pressing plate 2d, the water stop plate 2c is sleeved on the valve rod 2a and is fixed with the valve rod 2a in a tight fit mode, and a hard seal is formed between the water stop plate 2c and the valve rod 2 a. One surface of the water stop plate 2c facing the guide seat I1 a is provided with a convex fixing ring 2c1, the fixing ring 2c1 is sleeved on the valve rod 2a, the sealing gasket 2b and the pressing plate 2d are sleeved on the fixing ring 2c1, and the sealing gasket 2b is positioned between the water stop plate 2c and the pressing plate 2 d. The end part of the fixing ring 2c1, which is close to the first guide seat 1a, is folded outwards to form a pressing ring 2c2, the pressing ring 2c2 abuts against one surface, facing the first guide seat 1a, of the pressing plate 2d, and the pressing ring 2c2 enables the pressing plate 2d and the water stop plate 2c to tightly press and fix the sealing gasket 2 b. The sealing gasket 2b is provided with a protruding annular water stop convex ring 2b1 on the surface abutting against the pressure plate 2d, and the water stop convex ring 2b1 is pressed on the pressure plate 2d to form sealing. The spring 3 is sleeved on the valve rod 2a, and two ends of the spring 3 are respectively abutted against the first guide seat 1a and the pressure plate 2 d. The structure of the valve body 2 reduces the possibility of leakage at the gasket 2b, and makes the check valve stable in use.

The equal fixedly connected with coupling 4 in both ends of valve body 1, coupling 4 detachable fixed connection is on valve body 1. Be connected with locking cap 5 between coupling 4 and the valve body 1, the one end suit of locking cap 5 has convex holding ring 5a on the medial surface of the locking cap 5 other end and with valve body 1 threaded connection, has convex fender edge 4g near valve body 1 department on the lateral surface of coupling 4, keeps off and lies in between holding ring 5a and the valve body 1 along 4g, and holding ring 5a supports and leans on keeping off along 4 g. Or the inner end of the pipe nipple 4 is inserted into the valve body 1 and forms a screw connection. A convex annular blocking ring 4a is arranged on the inner side surface of the pipe joint 4 close to the valve body 1, at least one step surface 4b is arranged on the inner side surface of the pipe joint 4 and positioned on the outer side of the blocking ring 4a, mounting sections 4c with different apertures are formed on two sides of each step surface 4b on the pipe joint 4, and an annular cutting groove 4d is arranged on the outer side surface of the pipe joint 4 corresponding to the step surfaces 4 b. In this embodiment, a step surface 4b is provided on the inner side surface of the pipe joint 4, a cutting groove 4d is correspondingly provided on the outer side surface of the pipe joint 4, and two mounting sections 4c are formed on the pipe joint 4. In order to better adapt to the specification of the pipe joint 4, two or more stepped surfaces 4b may be provided on the inner side surface of the pipe joint 4, and three or more mounting sections 4c may be formed on the pipe joint 4. And the outer side surface of each mounting section 4c is provided with an aperture value 4e corresponding to the aperture of the mounting section 4 c. Cutting marks 4f are arranged on the outer side surface of the pipe joint 4 and positioned on two sides of the cutting groove 4d, and the cutting marks 4f comprise arrows and letters. The coupling 4 is made by the PPR material, and the pipe fitting is the PPR pipe, and the pipe fitting inserts and can pass through the hot melt to fix in the coupling 4. And a sealing ring 6 is arranged between the inner end surface of the pipe joint 4 and the end surface of the valve body 1.

When the check valve is used, one corresponding installation section 4c is selected according to the pipe fitting specification of a construction site. When the proper installation section 4c is positioned at the outermost side of the pipe joint 4, the pipe fitting is directly inserted into the pipe joint 4 for fixed connection without cutting, and the end face of the pipe fitting abuts against the corresponding step face 4b for axial positioning during insertion. When the selected installation section 4c is positioned on the inner side, cutting off the redundant installation section 4c, cutting the installation section from the cutting groove 4d during cutting, inserting the pipe fitting into the pipe joint 4 for fixed connection, and axially positioning the end face of the pipe fitting against the corresponding step face 4b during inserting; when the fitting section 4c is positioned innermost, the end surface of the pipe member is positioned axially against the retainer ring 4 a. This check valve makes coupling 4 have the installation section 4c in a plurality of different apertures through set up step surface 4b on coupling 4, and a plurality of installation sections 4c can correspond the pipe fitting of installing multiple specification, make check valve erection joint convenient on the pipeline. And set up cutting groove 4d on coupling 4, sign and injecing the cutting part, guarantee to cut and target in place, make check valve erection joint convenient on the pipeline. In addition, the pipe joint 4 is fixedly connected with the valve body 1 in a detachable mode, when the hole diameter of the installation section 4c on the pipe joint 4 cannot be connected with a pipe fitting or the position of the installation section 4c is cut in a wrong mode during cutting, the pipe joint 4 can be replaced by a new pipe joint 4 after being detached, the check valve is convenient to install and connect on a pipeline, meanwhile, the replacement of the whole check valve is avoided, and cost reduction is facilitated.

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

1. A check valve comprises a valve body (1) and a valve core (2), wherein a first guide seat (1a) and a second guide seat (1b) are arranged on the inner wall of the valve body (1), a sealing seat (1c) is arranged on the inner wall of the valve body (1) and between the first guide seat (1a) and the second guide seat (1b), the valve core (2) comprises a valve rod (2a), two ends of the valve rod (2a) are respectively inserted into the first guide seat (1a) and the second guide seat (1b), a sealing gasket (2b) arranged between the first guide seat (1a) and the sealing seat (1c) is fixed on the valve rod (2a), a spring (3) is arranged between the valve core (2) and the first guide seat (1a), the spring (3) acts on the valve core (2) to enable the sealing gasket (2b) to abut against the sealing seat (1c) and form sealing, the equal fixedly connected with coupling (4) in both ends of valve body (1), it is provided with convex fender ring (4a) to be close to valve body (1) department on the medial surface of coupling (4), its characterized in that, the outside that lies in fender ring (4a) on the medial surface of coupling (4) is provided with at least one step face (4b), the both sides at every step face (4b) on coupling (4) form the different installation section in aperture (4c), be provided with on the lateral surface of coupling (4) with step face (4b) corresponding department and be annular cutting groove (4 d).

2. The non-return valve according to claim 1, characterized in that each mounting section (4c) is provided on its outer side with an aperture value (4e) corresponding to the aperture of the mounting section (4 c).

3. Non-return valve according to claim 1, characterized in that the outer side of the pipe connection (4) on both sides of the cutting groove (4d) is provided with cutting marks (4 f).

4. Non-return valve according to one of claims 1 to 3, characterized in that the pipe connection (4) is detachably fixedly connected to the valve body (1).

5. The check valve according to claim 4, characterized in that a locking cap (5) is connected between the pipe joint (4) and the valve body (1), one end of the locking cap (5) is sleeved on the valve body (1) and is in threaded connection with the valve body (1), a protruding positioning ring (5a) is arranged on the inner side surface of the other end of the locking cap (5), a protruding blocking edge (4g) is arranged on the outer side surface of the pipe joint (4) and close to the valve body (1), the blocking edge (4g) is arranged between the positioning ring (5a) and the valve body (1), and the positioning ring (5a) is abutted against the blocking edge (4 g).

6. Non-return valve according to any one of claims 1 to 3, characterized in that the pipe connector (4) is made of PPR material.

7. The check valve according to any one of claims 1 to 3, wherein the valve core (2) further comprises a water stop plate (2c) and a pressure plate (2d), the water stop plate (2c) is sleeved on the valve rod (2a) and is tightly matched and fixed with the valve rod (2a), a protruding fixing ring (2c1) is arranged on one surface of the water stop plate (2c) facing the first guide seat (1a), the sealing gasket (2b) and the pressure plate (2d) are sleeved on the fixing ring (2c1), the sealing gasket (2b) is positioned between the water stop plate (2c) and the pressure plate (2d), the end part of the fixing ring (2c1) close to the first guide seat (1a) is folded outwards to form a pressure ring (2c2), and the pressure ring (2c2) abuts against one surface of the pressure plate (2d) facing the first guide seat (1 a).

8. The check valve according to claim 7, characterized in that the sealing gasket (2b) has a protruding annular water stop protruding ring (2b1) on the surface abutting against the pressure plate (2 d).

9. Non-return valve according to claim 5, characterized in that a sealing ring (6) is arranged between the pipe connection (4) and the valve body (1).