High-pressure corrosion-resistant check valve

Abstract

The utility model discloses a high-pressure corrosion-resistant check valve which comprises a first valve seat and a second valve seat, the second valve seat is arranged below the first valve seat, a valve element assembly is arranged between the first valve seat and the second valve seat, and an elastic assembly and a sealing ball are arranged in the valve element assembly. A first flow channel and a second flow channel are arranged at the upper end and the lower end of the valve element assembly respectively, an upper groove channel and a lower groove channel are formed in the valve element assembly, an elastic assembly is arranged in the upper groove channel, a sealing ball is arranged in the lower groove channel, and the elastic assembly presses the sealing ball; meanwhile, a first sealing ring and a second sealing ring are arranged in the middle and the lower portion of the valve element assembly respectively, and by means of cooperation of the internal structure of the whole valve seat, the check valve can resist high pressure and corrosion and is economical and good in application under harsh working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a high-pressure corrosion-resistant check valve. Background Art

[0002] A check valve, also known as a one-way valve, is used in a fluid (gas or liquid) system to prevent the reverse flow of oil. Check valves are widely used in the industry. The check valve includes a valve body, a valve core and an elastic element, and the valve core and the elastic element are arranged inside the valve body. In the prior art, one-way valves made of metal materials can meet the requirements of high-pressure application environments, but cannot meet the chemical compatibility of materials used in strong acid and strong alkali processes. One-way valves made of corrosion-resistant materials cannot meet the requirements of applications under high-pressure conditions due to their unreasonable structures. Therefore, a high-pressure corrosion-resistant check valve is proposed to address the above problems. Utility Model Content

[0003] The utility model aims to provide a high-pressure corrosion-resistant check valve to solve the problems raised in the above background.

[0004] In order to solve the above technical problems, the utility model specifically provides the following technical solutions: a high-pressure corrosion-resistant check valve, comprising a first valve seat and a second valve seat, a second valve seat is provided below the first valve seat, and a valve core assembly is provided between the first valve seat and the second valve seat, an elastic assembly and a sealing ball are provided inside the valve core assembly, and the top of the sealing ball is pressed into the bottom of the elastic assembly, a first sealing ring is provided in the middle of the valve core assembly, and a second sealing ring is provided below the inside of the valve core assembly, and the second sealing ring is sleeved outside the bottom of the sealing ball.

[0005] Preferably, a first high-pressure connector with a threaded connection is inserted above the first valve seat and is communicated with the valve core assembly, and a second high-pressure connector with a threaded connection is inserted below the second valve seat and is communicated with the valve core assembly.

[0006] Preferably, a built-in space is defined in the first valve seat, and the bottom of the built-in space is fixedly connected and sealed to the top of the second valve seat, and a valve core assembly is fixedly inserted into the built-in space.

[0007] Preferably, the first flow channel and the second flow channel are respectively opened in the middle of the upper and lower ends of the valve core assembly, and an upper groove connected to the lower groove is respectively opened in the upper and lower middle parts of the valve core assembly, and the upper groove, the lower groove, the first flow channel and the second flow channel are connected.

[0008] Preferably, the top of the upper groove is fixedly connected to the top of the elastic component, and the lower end of the elastic component is suspended above the lower groove.

[0009] Preferably, the upper part of the second flow channel is inserted below the sealing ball, and the sealing ball is placed in the lower channel.

[0010] Preferably, a sealing channel is opened in the middle of the valve core assembly, and a first sealing ring is fixedly inserted into the sealing channel.

[0011] Preferably, a second sealing ring is pressed between the side wall of the lower groove and the bottom of the sealing ball.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model is connected to the second valve seat by fixing the first valve seat below, and valve core components are arranged inside the two, the first flow channel and the second flow channel are respectively arranged at the upper and lower ends of the valve core component, and the upper groove and the lower groove are arranged in the valve core component, the upper groove is provided with an elastic component, the lower groove is provided with a sealing ball, and the elastic component is pressed against the sealing ball, and the first sealing ring and the second sealing ring are respectively arranged in the middle and the lower part of the valve core component. The internal structure of the whole valve seat is coordinated to form a check valve which is resistant to high pressure and corrosion, and is economical and has good performance to solve the application under harsh working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the first valve seat and the second valve seat of the utility model;

[0017] Figure 3 It is an enlarged schematic diagram of point A of the present utility model.

[0018] The reference numerals in the accompanying drawings represent the following:

[0019] 1. First valve seat; 101. Built-in space; 2. Second valve seat; 3. Valve core assembly; 31. Upper groove; 32. Lower groove; 33. Sealing channel; 4. Elastic assembly; 5. Sealing ball; 6. First sealing ring; 7. Second sealing ring; 8. First high-pressure connector; 9. Second high-pressure connector; 10. First flow channel; 11. Second flow channel. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-3 As shown, the utility model provides a high-pressure corrosion-resistant check valve, including a first valve seat 1 and a second valve seat 2, the second valve seat 2 is provided below the first valve seat 1, and a valve core assembly 3 is provided between the first valve seat 1 and the second valve seat 2, an elastic assembly 4 and a sealing ball 5 are provided inside the valve core assembly 3, and the upper part of the sealing ball 5 is pressed into the bottom of the elastic assembly 4, a first sealing ring 6 is provided in the middle of the valve core assembly 3, and a second sealing ring 7 is provided below the inside of the valve core assembly 3, and the second sealing ring 7 is sleeved outside the lower part of the sealing ball 5.

[0022] Please refer to Figure 1 In this embodiment, a first high-pressure connector 8 is threadedly inserted above the first valve seat 1 and is connected to the valve core assembly 3 , and a second high-pressure connector 9 is threadedly inserted below the second valve seat 2 and is connected to the valve core assembly 3 .

[0023] Furthermore, a built-in space 101 is opened in the first valve seat 1 , and the bottom of the built-in space 101 is fixedly connected and sealed with the top of the second valve seat 2 , and the valve core assembly 3 is fixedly inserted into the built-in space 101 .

[0024] Among them, the first valve seat 1 and the second valve seat 2 are combined into a whole valve seat, and the first high-pressure connector 8 and the second high-pressure connector 9 are installed at both ends of the valve seat to connect to the outside for operation, so that the fluid flows from the second high-pressure connector 9 through the entire valve seat to the first high-pressure connector 8.

[0025] Please refer to Figure 2 and Figure 3 Furthermore, a first flow channel 10 and a second flow channel 11 are respectively opened in the middle of the upper and lower ends of the valve core assembly 3, and an upper groove 31 and a lower groove 32 are respectively opened in the upper and lower parts of the middle of the valve core assembly 3 to communicate with each other, and at the same time, the upper groove 31, the lower groove 32, the first flow channel 10, and the second flow channel 11 are connected.

[0026] Furthermore, the top of the upper groove 31 is fixedly connected to the top of the elastic component 4 , and the lower end of the elastic component 4 is placed in the lower groove 32 and suspended above.

[0027] Furthermore, the upper part of the second flow channel 11 is inserted into the lower part of the sealing ball 5 , and the sealing ball 5 is placed in the lower groove 32 .

[0028] An elastic component 4 and a sealing ball 5 are provided inside the valve core component 3 installed inside the entire valve seat. Due to the characteristics of the elastic component 4, the sealing ball 5 is pressed at the mouth of the lower groove 32 below the valve core component 3 and at the upper mouth of the second flow channel 11 to seal, thereby preventing the fluid from reversely entering the second high-pressure connector 9 below.

[0029] Furthermore, a sealing channel 33 is opened in the middle of the valve core assembly 3, and the first sealing ring 6 is fixedly inserted into the sealing channel 33.

[0030] Furthermore, a second sealing ring 7 is pressed between the side wall of the lower groove 32 and the bottom of the sealing ball 5 .

[0031] A first sealing ring 6 and a second sealing ring 7 are respectively provided in the lower groove 32 in the middle and lower part of the valve core assembly 3. Since the valve core assembly 3 is also composed of two parts, the first sealing ring 6 is placed under the sealing ball 5 to prevent the fluid from flowing out of the middle part, and the second sealing ring 7 is placed under the sealing ball 5. The fluid flowing back from the top will be blocked by the second sealing ring 7.

[0032] Working principle:

[0033] After the first valve seat 1 and the second valve seat 2 are connected to each other, a whole valve seat is formed, and the two ends of the whole valve seat are respectively connected by a first high-pressure connector 8 and a second high-pressure connector 9 by threads, and the two are communicated with the valve core component 3 inside the whole valve seat, and the first flow channel 10 and the second flow channel 11 are respectively provided at the upper and lower ends of the valve core component 3, and the valve core component 3 is provided with an upper groove 31 and a lower groove 32, and the four are mutually circulated, and an elastic component 4 is provided in the upper groove 31, and a sealing ball 5 is provided in the lower groove 32, and the elastic component 4 is pressed against the sealing ball 5, and at the same time, the middle and lower parts of the valve core component 3 are divided into A first sealing ring 6 and a second sealing ring 7 are separately provided. When the fluid enters from the second high-pressure joint 9 to the inside, the sealing ball 5 will be lifted up, and the fluid can smoothly reach the first high-pressure joint 8 through the internal structure. Since the elastic component 4 presses the sealing ball 5 inside, and a second sealing ring 7 is arranged under the sealing ball 5, if the fluid flows from the first high-pressure joint 8 to the second high-pressure joint 9, the flow direction of the fluid at this time is consistent with the direction of the elastic component 4 pressing the sealing ball 5. In this way, the sealed ball 5 and the second sealing ring 7 cooperate to block the mouth of the second flow channel 11 to prevent reverse flow.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A high-pressure corrosion-resistant check valve, comprising a first valve seat (1) and a second valve seat (2), characterized in that: A second valve seat (2) is provided below the first valve seat (1), and a valve core assembly (3) is provided between the first valve seat (1) and the second valve seat (2); an elastic assembly (4) and a sealing ball (5) are provided inside the valve core assembly (3), and the top of the sealing ball (5) is pressed into the bottom of the elastic assembly (4); a first sealing ring (6) is provided in the middle of the valve core assembly (3), and a second sealing ring (7) is provided at the bottom of the valve core assembly (3), and the second sealing ring (7) is sleeved outside the bottom of the sealing ball (5).

2. A high pressure corrosion resistant check valve according to claim 1, characterized in that: A first high-pressure connector (8) is threadedly inserted above the first valve seat (1), and the first high-pressure connector (8) is communicated with the valve core assembly (3); a second high-pressure connector (9) is threadedly inserted below the second valve seat (2), and the second high-pressure connector (9) is communicated with the valve core assembly (3).

3. A high-pressure corrosion-resistant check valve according to claim 2, characterized in that: The first valve seat (1) has a built-in space (101) therein, and the bottom of the built-in space (101) is fixedly connected and sealed to the top of the second valve seat (2), while a valve core assembly (3) is fixedly inserted into the built-in space (101).

4. A high-pressure corrosion-resistant check valve according to claim 1, characterized in that: The first flow channel (10) and the second flow channel (11) are respectively provided in the middle of the upper and lower ends of the valve core assembly (3), and an upper groove (31) and a lower groove (32) are respectively provided in the upper and lower middle parts of the valve core assembly (3) to communicate with each other, and the upper groove (31), the lower groove (32), the first flow channel (10) and the second flow channel (11) are also communicated with each other.

5. A high-pressure corrosion-resistant check valve according to claim 4, characterized in that: The top of the upper groove (31) is fixedly connected to the top of the elastic component (4), and the lower end of the elastic component (4) is placed in the lower groove (32) and suspended in the air.

6. A high-pressure corrosion-resistant check valve according to claim 5, characterized in that: The upper part of the second flow channel (11) is inserted into the lower part of the sealing ball (5), and the sealing ball (5) is placed in the lower groove (32).

7. A high-pressure corrosion-resistant check valve according to claim 6, characterized in that: A sealing channel (33) is provided in the middle of the valve core assembly (3), and a first sealing ring (6) is inserted and fixedly connected in the sealing channel (33).

8. A high-pressure corrosion-resistant check valve according to claim 7, characterized in that: A second sealing ring (7) is pressed between the side wall of the lower groove (32) and the bottom of the sealing ball (5).

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