Check valve with protection function

Abstract

The utility model discloses a check valve with a protection function, which comprises a valve body, and a protection compensation component is arranged in the valve body. A sleeve is fixedly connected to the inner wall of the valve body, a limiting rod is inserted into one end of the sleeve, the protection compensation assembly comprises a supporting spring fixedly connected with the inner wall of the valve body, and a valve clack assembly is arranged at one end of the supporting spring. The valve clack assembly comprises a valve clack body fixedly connected with one end of the supporting spring, the valve clack body is of a T-shaped structure, one end of the valve clack body is of a hollow structure, a sealing plug is arranged in the valve clack body, a protective layer is arranged on the outer wall of the sealing plug, a notch is formed in the inner wall of the sealing plug, a compensation air bag is arranged in the sealing plug, and a protrusion is arranged on the outer wall of the compensation air bag. The protrusion is inserted into the notch, and one end of the compensation air bag is connected with an air pipe. According to the device, the sealing performance of the valve clack body can be improved, meanwhile, the valve clack body is compensated in time when the valve clack body is abraded, the valve clack body is kept in close contact with the valve body, and the situation of leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a check valve with a protective function. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement modes are divided into lift type and swing type. The lift check valve is similar in structure to the stop valve, except that it lacks a valve stem that drives the disc.

[0003] At present, the valve disc of the check valve is mainly opened and closed by spring support. During the use of the valve disc, the outer wall of the valve disc will contact and rub against the inner wall of the valve body, resulting in wear and tear. It needs to be replaced in time to avoid leakage problems, so improvements are needed. Utility Model Content

[0004] The utility model aims to provide a check valve with a protective function to solve the problem that the outer wall of the check valve disc is easily worn and affects the sealing performance as mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a check valve with a protection function, comprising a valve body, wherein a protection compensation component is arranged inside the valve body;

[0006] The protection compensation component includes a support spring fixedly connected to the inner wall of the valve body, and a valve flap component is arranged at one end of the support spring;

[0007] The valve flap assembly includes a valve flap body fixedly connected to one end of a supporting spring, the valve flap body is a "T"-shaped structure, one end of the valve flap body is a hollow structure, a sealing plug is arranged inside the valve flap body, a protective layer is arranged on the outer wall of the sealing plug, a notch is opened on the inner wall of the sealing plug, a compensation air bag is arranged inside the sealing plug, a protrusion is arranged on the outer wall of the compensation air bag, the protrusion is inserted inside the notch, and one end of the compensation air bag is connected to a trachea.

[0008] Preferably, a sleeve is fixedly connected to the inner wall of the valve body, a limiting rod is inserted into one end of the sleeve, one end of the limiting rod is fixedly connected to one end of the supporting spring, and the limiting rod and the sleeve form a sliding connection.

[0009] Preferably, one end of the limit rod is fixedly connected to the valve flap body, and the inner wall of the sleeve is connected to the other end of the support spring.

[0010] Preferably, an air pipe is inserted into the support spring, one end of the air pipe passes through the sleeve and the valve body and is located on the outer wall of the valve body, and a sealing cover is provided at one end of the air pipe.

[0011] Preferably, a slide groove is provided inside the sleeve, and one end of the limiting rod is in a "T"-shaped structure, and the "T"-shaped structure is consistent with the slide groove.

[0012] Preferably, the sealing plug is made of elastic material, and the notch on the inner wall of the sealing plug has the same shape as the protruding structure on the surface of the compensation airbag.

[0013] Preferably, a water inlet is provided on one side of the valve body, a water outlet is provided on the other side of the valve body, and a valve cover is provided on the top of the valve body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) This device can improve the sealing performance of the valve disc body, and at the same time, it can timely compensate the valve disc body when the valve disc body is worn, so that the valve disc body maintains close contact with the valve body, avoiding leakage.

[0016] (2) The device is provided with a sealing plug on the inner wall of the valve disc body, a notch is opened on the inner wall of the sealing plug, and a compensating air bag is provided inside the sealing plug. The compensating air bag can support the sealing plug to open by expanding, thereby pushing the valve disc body and the valve body to maintain a close fit, thereby improving the sealing effect and avoiding the reduction of the sealing performance due to the wear of the valve disc body.

[0017] (3) The device can play a protective role by providing a protective layer on the outer wall of the valve disc body, thereby increasing the service life of the valve disc body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a check valve with a protective function of the utility model;

[0019] Figure 2 The utility model is a check valve with a protective function Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 The utility model is a cross-sectional view of a valve disc body of a check valve with a protective function.

[0021] In the figure: 1. valve body; 2. valve cover; 3. protection compensation assembly; 31. air pipe; 32. sealing cover; 33. valve disc assembly; 331. valve disc body; 332. protection layer; 333. sealing plug; 334. compensation airbag; 34. limit rod; 35. sleeve; 36. support spring; 4. water inlet; 5. water outlet. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a technical solution: a check valve with a protective function, comprising a valve body 1, a protective compensation component 3 is arranged inside the valve body 1; a water inlet 4 is arranged on one side of the valve body 1, a water outlet 5 is arranged on the other side of the valve body 1, and a valve cover 2 is arranged on the top of the valve body 1; this part is all prior art, so the applicant will not elaborate on it in detail; a sleeve 35 is fixedly connected to the inner wall of the valve body 1, a limiting rod 34 is inserted at one end of the sleeve 35, one end of the limiting rod 34 is fixedly connected to one end of a support spring 36, and the limiting rod 34 and the sleeve 35 form a sliding connection; this structure can avoid the tilt of the support spring 36 during the lifting and lowering of the valve flap body 331 by arranging the sleeve 35 and the limiting rod 34; one end of the limiting rod 34 is fixedly connected to the inner wall of the valve body 1 The valve flap body 331 is connected, and the inner wall of the sleeve 35 is connected to the other end of the support spring 36; this structure can ensure the sealing of the valve flap body 331 in the absence of medium flow through the support spring 36; an air pipe 31 is inserted into the support spring 36, one end of the air pipe 31 passes through the sleeve 35 and the valve body 1 and is located on the outer wall of the valve body 1, and a sealing cover 32 is provided at one end of the air pipe 31; this structure facilitates the work of inflation and exhaust by providing the air pipe 31; the sealing cover 32 is provided to prevent gas from leaking from the air pipe 31; a slide groove is provided inside the sleeve 35, and one end of the limit rod 34 is in a "T" shape structure, and the "T" shape structure coincides with the slide groove; this structure can ensure the stability of the valve flap body 331 during the lifting process by providing the limit rod 34;

[0024] The protection compensation assembly 3 includes a support spring 36 fixedly connected to the inner wall of the valve body 1, and a valve flap assembly 33 is arranged at one end of the support spring 36;

[0025] The valve flap assembly 33 includes a valve flap body 331 fixedly connected to one end of the support spring 36, the valve flap body 331 is a "T"-shaped structure, one end of the valve flap body 331 is a hollow structure, a sealing plug 333 is arranged inside the valve flap body 331, the sealing plug 333 is made of elastic material, and the notch on the inner wall of the sealing plug 333 is of the same shape as the raised structure on the surface of the compensation airbag 334; this structure can expand the sealing plug 333 through the expansion of the compensation airbag 334, so that the sealing plug 333 supports the valve flap body 331 and ensures the contact between the valve flap body 331 and the valve body 1; a protective layer 332 is arranged on the outer wall of the sealing plug 333, a notch is opened on the inner wall of the sealing plug 333, a compensation airbag 334 is arranged inside the sealing plug 333, a protrusion is arranged on the outer wall of the compensation airbag 334, the protrusion is inserted in the notch, and one end of the compensation airbag 334 is connected to the trachea 31.

[0026] Working principle: When using the check valve with a protective function, first, when the medium enters from the water inlet 4, the valve flap body 331 moves upward under the push of pressure, so that the valve flap body 331 is separated from the valve body 1, and the medium is smoothly discharged from the water outlet 5. When no medium passes through, the valve flap body 331 is tightly fitted with the valve body 1 under the support of the support spring 36. If the valve flap body 331 and the valve body 1 are not in close contact, the sealing cover 32 can be opened to replenish gas into the compensation airbag 334 through the air pipe 31 to expand the compensation airbag 334. During the expansion process, the compensation airbag 334 supports the sealing plug 333 to open, thereby supporting the valve flap body 331 to be in close contact with the valve body 1, thereby ensuring the sealing performance. After the gas replenishment is completed, the sealing cover 32 can be used to seal the compensation airbag 334.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A check valve with a protective function, comprising a valve body (1), characterized in that: A protection and compensation component (3) is arranged inside the valve body (1); The protection compensation assembly (3) comprises a support spring (36) fixedly connected to the inner wall of the valve body (1), and a valve flap assembly (33) is arranged at one end of the support spring (36); The valve flap assembly (33) comprises a valve flap body (331) fixedly connected to one end of a support spring (36); the valve flap body (331) is a "T"-shaped structure; one end of the valve flap body (331) is a hollow structure; a sealing plug (333) is arranged inside the valve flap body (331); a protective layer (332) is arranged on the outer wall of the sealing plug (333); a notch is provided on the inner wall of the sealing plug (333); a compensation air bag (334) is arranged inside the sealing plug (333); a protrusion is arranged on the outer wall of the compensation air bag (334); the protrusion is inserted into the notch; and one end of the compensation air bag (334) is connected to the air pipe (31).

2. A check valve with protection function according to claim 1, characterized in that: A sleeve (35) is fixedly connected to the inner wall of the valve body (1), a limiting rod (34) is inserted into one end of the sleeve (35), one end of the limiting rod (34) is fixedly connected to one end of a support spring (36), and the limiting rod (34) and the sleeve (35) form a sliding connection.

3. A check valve with protection function according to claim 2, characterized in that: One end of the limit rod (34) is fixedly connected to the valve flap body (331), and the inner wall of the sleeve (35) is connected to the other end of the support spring (36).

4. A check valve with protection function according to claim 1, characterized in that: An air pipe (31) is inserted into the support spring (36), one end of the air pipe (31) passes through the sleeve (35) and the valve body (1) and is located on the outer wall of the valve body (1), and a sealing cover (32) is provided at one end of the air pipe (31).

5. A check valve with protection function according to claim 2, characterized in that: A sliding groove is provided inside the sleeve (35), and one end of the limiting rod (34) is in a "T"-shaped structure, wherein the "T"-shaped structure matches the sliding groove.

6. A check valve with protection function according to claim 1, characterized in that: The sealing plug (333) is made of elastic material, and the notch on the inner wall of the sealing plug (333) has the same shape as the protruding structure on the surface of the compensation airbag (334).

7. A check valve with protection function according to claim 1, characterized in that: A water inlet (4) is provided on one side of the valve body (1), a water outlet (5) is provided on the other side of the valve body (1), and a valve cover (2) is provided on the top of the valve body (1).

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