CN213871237U

CN213871237U - Simple and reliable check valve

Info

Publication number: CN213871237U
Application number: CN202022013641.4U
Authority: CN
Inventors: 蒋开洪; 段小成; 张紫星; 张科迪; 王晨
Original assignee: Ningbo Tuopu Group Co Ltd
Current assignee: Ningbo Tuopu Group Co Ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-08-03
Anticipated expiration: 2030-09-15

Abstract

The utility model discloses a simple and reliable check valve, including end cover and skeleton, the one end of skeleton can be dismantled and be connected with the end cover, the tip of skeleton be provided with the strengthening rib for water inlet and water inlet department, the skeleton lateral wall on be provided with the delivery port, the inside activity of skeleton be provided with the case, the one end of case for plugging up the bulb face of water inlet, the other end is provided with the guide arm that inserts in the end cover, the outside of guide arm cup jointed the spring that one end and end cover withstood, the middle part of strengthening rib be provided with the guide post that inserts the case lower extreme. The utility model discloses have buffering and guide structure, strengthened the intensity of skeleton, spare part is few.

Description

Simple and reliable check valve

Technical Field

The utility model relates to a check valve field specifically is a simple and reliable check valve.

Background

The check valve is a valve which is automatically opened and closed by the flow of the fluid medium and is used for preventing the fluid medium from flowing backwards. The conventional one-way valve adopts a form of 'steel balls and springs' to realize the function of the one-way valve, a fluid medium jacks up a valve core controlled by a spring by virtue of pressure difference from bottom to top, and after the pressure difference disappears, the valve core is pressed down by spring force to seal a channel for backflow of the fluid medium.

The function of the one-way valve is represented as follows: 1. protecting the pump in the system (preventing residual pressure in the system from causing the liquid pump motor to reverse when the motor is stopped); 2. the pressure in the system is prevented from suddenly rising during the operation of the system, so that parts in the system are prevented from being damaged; 3. and other valves form a compound valve to adapt to different working conditions of the system.

However, the spring of the check valve is easy to damage and not easy to replace, the check valve fails when the spring of the check valve is damaged, and the framework of the check valve is easy to damage when the check valve is impacted by a larger pressure, and the whole framework of the check valve is not enough, so that the existing check valve needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a simple and reliable check valve has buffering and guide structure, has strengthened the intensity of skeleton, and spare part is few.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a simple and reliable check valve, includes end cover and skeleton, the one end of skeleton can be dismantled and be connected with the end cover, the tip of skeleton be provided with the strengthening rib for water inlet and water inlet department, the skeleton lateral wall on be provided with the delivery port, the inside activity of skeleton be provided with the case, the one end of case for plugging up the bulb face of water inlet, the other end is provided with the guide arm that inserts in the end cover, the outside of guide arm cup jointed the spring that one end and end cover withstood, the middle part of strengthening rib be provided with the guide post that inserts the case lower extreme.

Preferably, the middle part of the reinforcing rib integrally protrudes and is conical.

As preferred, the one end that skeleton and end cover link to each other be provided with a plurality of breach round the circumference, the one end upside of breach be provided with the buckle that stretches out along the circumferencial direction, the end cover inside wall on be provided with the buckle chimb corresponding with the buckle, the skeleton is rotatory to be made buckle and corresponding buckle chimb to detain mutually.

Preferably, an outer leakage O-shaped sealing ring is installed on the outer side of the end cover, a valve core O-shaped sealing ring is installed on the outer side of the valve core, and an inner leakage O-shaped sealing ring is installed on the outer side of the framework.

Preferably, a limiting hole for inserting the guide rod is arranged in the middle of the top of the inner side of the end cover.

Preferably, the bottom of the guide rod is provided with a pre-tightening step which is abutted against the spring.

Preferably, the top of the end cap is provided with a plurality of small holes around the circumference.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the framework is connected with the end cover through the buckle, a complex connecting mechanism is removed, the structural integration degree is high, the number of parts is small, the assembly is more convenient, the light weight is facilitated, and the cost is more advantageous;

2. the lower end face of the valve core is provided with the ball head face, so that the contact area with a liquid medium is increased, a guiding effect is achieved, the impact of the liquid medium on the valve core is reduced, the valve core is provided with a guiding structure, the radial impact force of the liquid medium on the spring is effectively eliminated, and the service life of the valve core spring is prolonged.

3. The valve core is sleeved on the guide post of the framework and slides up and down along the guide post, so that radial impact on the valve core can be effectively eliminated, and the valve core and the spring are axially fixed.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a structural view of the present invention in an exploded state;

FIG. 3 is a front view of the structure of the half-section of the present invention;

FIG. 4 is a perspective view of the present invention in another direction;

FIG. 5 is a partial cross-sectional structural view of the present invention;

fig. 6 is a three-dimensional structure view of the end cap of the present invention;

fig. 7 is a perspective view of the frame of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figures 1-7, the utility model provides a simple and reliable check valve, which comprises an end cover 1 and a framework 6, one end of the framework 6 is detachably connected with the end cover 1, the end part of the framework 6 is a water inlet A, a reinforcing rib 6B is arranged at the water inlet, a water outlet B is arranged on the side wall of the framework 6, a valve core 4 is movably arranged in the framework 6, one end of the valve core 4 is a ball head surface 4a for blocking the water inlet A, the other end of the valve core 4 is provided with a guide rod 8 inserted into the end cover 1, a spring 3 with one end propped against the end cover 1 is sleeved outside the guide rod 8, a guide post 10 inserted into the lower end of the valve core 4 is arranged in the middle part of the reinforcing rib 6B, wherein the end cover 1 is turned by 6061, the valve core 4 and the framework 6 are injection molding parts and are formed by plastic injection molding, the material of the valve core spring is sus301, the whole middle part of the reinforcing rib 6B is protruded in a conical shape, thus, the ball head surface 4a of the valve core 4 is firstly contacted with the framework 6, and the valve core 4 is not contacted with the reinforcing rib 6b of the framework 6 so as to ensure the strength of the reinforcing rib 6 b; the inner surface of the framework 6 is designed to be connected by multiple curved surfaces so as to achieve better sealing effect.

Skeleton 6 and the one end that end cover 1 links to each other be provided with a plurality of breach round the circumference, the one end upside of breach be provided with buckle 6a that stretches out along the circumferencial direction, 1 inside wall of end cover on be provided with buckle chimb 9 that buckle 6a corresponds, 6 rotatory messenger's buckles 6a of skeleton and corresponding buckle chimb 9 mutually, pack skeleton 6 into end cover 1's dead slot earlier during the installation in, then rotatory certain angle makes 6a card of skeleton 6 go into in end cover 1 convex buckle chimb 9, simultaneously, end cover 1's top round the circumference be provided with a plurality of aperture 11, for the clamping hole of rotatory required frock.

Meanwhile, the framework can float due to the adoption of the buckle structure, when the pressure at the end A of the water inlet is far greater than the pressure at the end B of the water outlet, the framework 6 is jacked up, and the upper end surface 6c of the framework is contacted with the lower end surface 1c of the buckle convex edge 9 of the end cover 1 so as to offset the impact on the framework 6; when the pressure at the end B of the water outlet is far greater than the pressure at the end A of the water inlet, the framework 6 is pressed down, the lower end of the framework is in contact with the limiting surface on the valve body, so that the impact on the framework 6 is offset, and a certain buffering effect is achieved.

In order to ensure the sealing performance of the one-way valve, an outer leakage O-shaped sealing ring 2 is arranged on the outer side of the end cover 1, a valve core O-shaped sealing ring 5 is arranged on the outer side of the valve core 4, an inner leakage O-shaped sealing ring 7 is arranged on the outer side of the framework 6, and the outer leakage O-shaped sealing ring 2, the valve core O-shaped sealing ring 5 and the inner leakage O-shaped sealing ring 7 need to meet the requirements of normal physical performance, compression permanent deformation, low-temperature brittleness, liquid resistance and hot air aging performance. Meanwhile, the testing of 1# (IRM901) standard oil resistance, 3# (IRM903) standard oil resistance, refrigerant refrigerating machine oil resistance, ozone resistance, corrosion resistance and foamability can be passed.

A limiting hole 1a for inserting the guide rod 8 is formed in the middle of the top of the inner side of the end cover 1 so as to fix the valve core 4 and reduce radial force borne by the valve core. The bottom of the guide rod 8 is provided with a pre-tightening step 4b which is abutted against the spring 3, so that the spring 3 can be conveniently pre-tightened and installed.

When the one-way valve works, the pressure of the liquid medium at the water inlet A is larger than that at the water outlet B, the product of the pressure difference and the area of the ball head surface 4a at the lower end of the valve core 4 is larger than the sum of the spring force of the valve core and the gravity of the valve core, the valve core 4 is jacked up, and the one-way valve is opened. When the product of the pressure difference between the two ends of the water inlet A and the water outlet B and the area of the ball head surface 4a is smaller than the sum of the spring force of the valve core and the gravity of the valve core, the valve core is pressed in the framework, and the one-way valve is closed.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a simple and reliable check valve, includes end cover (1) and skeleton (6), the one end of skeleton (6) can be dismantled and be connected with end cover (1), its characterized in that, the tip of skeleton (6) be provided with strengthening rib (6B) for water inlet (A) and water inlet department, skeleton (6) lateral wall on be provided with delivery port (B), skeleton (6) inside activity be provided with case (4), the one end of case (4) for stopping up bulb face (4a) of water inlet (A), the other end is provided with guide arm (8) that insert in end cover (1), the outside of guide arm (8) cup jointed spring (3) that one end and end cover (1) withstood, the middle part of strengthening rib (6B) be provided with guide post (10) that insert case (4) lower extreme.

2. A simple and reliable non-return valve according to claim 1, characterized in that: the middle part of the reinforcing rib (6b) integrally protrudes to form a cone.

3. A simple and reliable non-return valve according to claim 1, characterized in that: skeleton (6) and the one end that end cover (1) link to each other be provided with a plurality of breach round the circumference, the one end upside of breach be provided with buckle (6a) that stretch out along the circumferencial direction, end cover (1) inside wall on be provided with buckle chimb (9) corresponding with buckle (6a), skeleton (6) are rotatory to be made buckle (6a) and corresponding buckle chimb (9) and are buckled mutually.

4. A simple and reliable non-return valve according to claim 1, characterized in that: the outer side of the end cover (1) is provided with an outer leakage O-shaped sealing ring (2), the outer side of the valve core (4) is provided with a valve core O-shaped sealing ring (5), and the outer side of the framework (6) is provided with an inner leakage O-shaped sealing ring (7).

5. A simple and reliable non-return valve according to claim 1, characterized in that: and a limiting hole (1a) for inserting the guide rod (8) is formed in the middle of the top of the inner side of the end cover (1).

6. A simple and reliable non-return valve according to claim 1, characterized in that: the bottom of the guide rod (8) is provided with a pre-tightening step (4b) which is propped against the spring (3).

7. A simple and reliable non-return valve according to claim 1, characterized in that: the top of the end cover (1) is provided with a plurality of small holes (11) around the circumference.