CN112984173A

CN112984173A - Normally closed micro-resistance slow-closing rubber check valve

Info

Publication number: CN112984173A
Application number: CN202110408849.2A
Authority: CN
Inventors: 陈希凡; 张道马; 颜庭军
Original assignee: CILIN & CAS ENVIRONMENTAL TECHNOLOGY (ANHUI) Inc
Current assignee: CILIN & CAS ENVIRONMENTAL TECHNOLOGY (ANHUI) Inc
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-06-18

Abstract

The invention discloses a normally closed micro-resistance slow-closing rubber check valve, which particularly relates to the technical field of check valves and comprises a rubber check valve core with an abdominal cavity and an outer sheath pipe positioned outside the rubber check valve core, wherein a buffer cavity is formed in the outer sheath pipe; the abdominal cavity mid-mounting of rubber check case has the deformation spring that cushions and decompress water hammer pressure, and the connecting pipe is installed to the other end, the both ends of outer protecting pipe all are connected with the reducing pipe, and the both ends of two reducing pipes all are connected with conduit. Compared with the traditional check valve, the check valve has the advantages of fewer mechanical parts, simple structural principle, no easily-damaged parts, quiet operation, no noise, no maintenance basically, small head loss and tightness in closing.

Description

Normally closed micro-resistance slow-closing rubber check valve

Technical Field

The invention relates to the technical field of check valves, in particular to a normally closed micro-resistance slow-closing rubber check valve.

Background

The mainstream steel check valve products adopted in the current market are as follows: the sealing mode comprises soft sealing and hard sealing. Because all the parts are mechanically driven, the device has the defects of complex structure, heavy weight, more parts, easy corrosion, easy abrasion, untight closing, large head loss, easy water leakage, large operation noise, high maintenance and replacement frequency and the like. The main reasons for these drawbacks are the complex construction, the excessive number of mechanical parts, the high manufacturing precision and maintenance specifications, the susceptibility to corrosion, the susceptibility to wear and leakage, and the impression given to the user that it is normal that the check valve should fail.

Disclosure of Invention

In order to solve the technical problems, the invention provides a normally closed micro-resistance slow-closing rubber check valve which comprises a rubber check valve core with an abdominal cavity and an outer sheath pipe positioned outside the rubber check valve core, wherein a buffer cavity is formed in the outer sheath pipe;

the utility model discloses a rubber check valve core, including rubber check valve core, water hammer pressure, the rubber check valve core, the abdominal cavity mid-mounting of rubber check valve core has the deformation spring that cushions and decompress water hammer pressure, and the connecting pipe is installed to the other end, the both ends of outer protecting pipe all are connected with the reducing pipe, and the both ends of two reducing pipes all are connected with conduit, and one of them conduit communicates with the cushion chamber, and another conduit communicates with the connecting pipe.

In a preferred embodiment, the diameter of the end of the reducing pipe connected with the water pipeline is smaller than the diameter of the end of the reducing pipe connected with the outer protective sleeve, the reducing pipe and the connecting pipe are connected through flanges, and the outer protective sleeve is provided with a water testing valve.

In a preferred embodiment, a clip for fixing is sleeved on the outer part of one end of the rubber check valve core, which is connected with the connecting pipe.

The invention has the technical effects and advantages that:

1. compared with the traditional check valve, the check valve has the advantages of fewer mechanical parts, simple structural principle, no easily-damaged parts, quiet operation, no noise, no maintenance basically, small head loss and tightness in closing;

2. the impact force generated by sudden pressure loss of the pipeline is buffered by utilizing the common deformation of the rubber check valve core and the deformation spring, the damage to the pump and the pipeline caused by the impact force of the reverse flow of the pipeline water flow is reduced, the direct impact of the reverse counter pressure to the pipeline and the water pump is counteracted, and the water hammer effect is effectively slowed down.

Drawings

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

Description of reference numerals: the device comprises a rubber check valve core 1, a reducing pipe 2, a buffer cavity 3, a deformation spring 4, a connecting pipe 5, a water conveying pipeline 6, a water testing valve 7, an outer protective sleeve 8 and a hoop 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

The normally-closed micro-resistance slow-closing rubber check valve shown in fig. 1 comprises a rubber check valve core 1 with an abdominal cavity and an outer protective sleeve 2 positioned outside the rubber check valve core 1, wherein a buffer cavity 3 is formed inside the outer protective sleeve 2, the rubber check valve core 1 is positioned inside the buffer cavity 3, one end of the rubber check valve core 1 is a valve nozzle, and the valve nozzle is bent inwards, contracted and attached and opened when being compressed;

a deformation spring 4 for buffering and reducing the pressure of a water hammer is arranged in the middle of the abdominal cavity of the rubber check valve core 1, a connecting pipe 5 is arranged at the other end of the rubber check valve core, two ends of the outer protective sleeve 8 are both connected with reducing pipes 2, two ends of the two reducing pipes 2 are both connected with water conveying pipelines 6, one water conveying pipeline 6 is communicated with the buffering cavity 3, and the other water conveying pipeline 6 is communicated with the connecting pipe 5;

when the water flow drainage device is used, water flow enters the connecting pipe 5 from the water conveying pipeline 6 and enters the rubber check valve core 1 from the connecting pipe 5, the rubber check valve core 1 is in a closed state under a normal state, and when the water flow enters, the rubber check valve core 1 can be smoothly opened for drainage under the action of upstream water pressure (only 30mm is needed);

when the water flow passes through the rubber check valve core 1, the opening of the rubber check valve core 1 is gradually enlarged along with the gradual increase of the pressure and the water quantity of upstream water, and then the water flow passes through the reducing pipe 9 and flows to the downstream water conveying pipeline 6;

if the upstream water flow power suddenly loses pressure or stops flowing, or the downstream water level increases or increases pressure, the water flow is reversely stopped to flow under the action of the rubber check valve core 1, even if the downstream pressure is too large, the water hammer phenomenon is formed by back flushing, a slow and buffer deformation space is generated under the combined action of the deformation spring 4 and the rubber check valve core 1, the direct impact of the reverse counter pressure on a pipeline and a water pump is counteracted, and the water hammer effect is effectively slowed down;

the diameter of the end, connected with the water pipeline 6, of the reducing pipe 2 is smaller than that of the end, connected with the outer protective sleeve 8, of the reducing pipe 2, the diameter of the outer protective sleeve 8, the diameter of the reducing pipe 2 and the diameter of the connecting pipe 5 are all connected through flanges, namely the check valve is a tubular object with a large middle part and small two ends, and pressure caused by a water hammer effect can be further reduced;

install water testing valve 24 on the outer protective sleeve 8, rubber check valve core 1 and connecting pipe 5 are connected one section outside cover and are equipped with clamp 10 that carries out the fixing, and clamp 10 is with rubber check valve core 1 fixed mounting on connecting pipe 5.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A normally closed micro-resistance slow-closing rubber check valve is characterized by comprising a rubber check valve core with an abdominal cavity and an outer sheath pipe positioned outside the rubber check valve core, wherein a buffer cavity is formed in the outer sheath pipe;

2. The normally closed micro-resistance slow-closing rubber check valve according to claim 1, characterized in that: the diameter of one end, connected with the water pipeline, of the reducing pipe is smaller than that of one end, connected with the outer protective sleeve, of the reducing pipe, the diameter of one end, connected with the outer protective sleeve, of the reducing pipe is connected with the connecting pipe through flanges, and the outer protective sleeve is provided with a water testing valve.

3. The normally closed micro-resistance slow-closing rubber check valve according to claim 1, characterized in that: the rubber check valve core and the outer sleeve at the connecting end of the connecting pipe are provided with a clamp for fixing.