An adjustable pressure relief valve

Abstract

This utility model discloses an adjustable pressure relief valve, relating to the field of centrifugal pump valve technology, including a pressure relief valve body, a pressure relief valve cap, a pressure relief valve core, a pressure relief valve spring, and a sealing ring. This utility model abandons the traditional complex casting form, adopting a simpler component assembly; it utilizes the threaded self-locking principle for installation and fixation, reducing reliance on complex sealing structures and significantly lowering processing and production costs; by adjusting the thread contact length to regulate the spring compression, the reliability of the pressure relief valve is further improved; it offers significant maintenance advantages, greatly reducing maintenance time and difficulty, improving equipment maintenance efficiency, and reducing equipment downtime; this utility model's adjustable pressure relief valve achieves significant improvements and advantages in structure, cost, reliability, and ease of maintenance, effectively solving the problems existing in current adjustable pressure relief valves, and has broad application prospects and practical value.

Description

Technical Field

[0001] This utility model relates to the field of valve technology for centrifugal pumps, specifically an adjustable pressure relief valve. Background Technology

[0002] In the existing field of adjustable pressure relief valves, their structural designs are generally quite complex. From a technological perspective, the production process involves numerous stages and is quite difficult to manufacture, making it challenging to effectively control production costs. Regarding the sealing principle, most existing pressure relief valves require castings to meet sealing requirements. However, the use of castings not only increases production costs but also complicates the sealing structure, demanding extremely high sealing precision. Once a sealing problem occurs, the repair process is extremely difficult, requiring significant manpower, resources, and time. These factors combined limit the reliability of existing pressure relief valves, making it difficult to meet the needs of applications with high requirements for cost control and reliability. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable pressure relief valve to solve the problems mentioned in the background art, such as the complex structure, complex process, and high processing difficulty of existing adjustable pressure relief valves.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable pressure relief valve, comprising a lower pressure relief valve body and an upper pressure relief valve cap, wherein a lower pressure relief valve core and an upper pressure relief valve spring are disposed inside the pressure relief valve body and the pressure relief valve cap, and a sealing ring is disposed between the pressure relief valve body and the pressure relief valve cap; an inlet is disposed at the center of the bottom of the pressure relief valve body, and an outlet is disposed at the middle of the side wall; external threads are respectively disposed at the upper and lower ends of the outer wall of the pressure relief valve body, and a sealing ring groove is disposed on the lower side of the upper external thread and a sealing ring is embedded therein. The valve body has a hollow interior for connecting the inlet and outlet. A neck is located below the outlet, and a pressure relief valve core is located above the neck. The pressure relief valve cap is a cylindrical shape with an open bottom and an internal thread on its inner wall, which is screwed onto the external thread at the top of the valve body. A sealing surface is located on the inner wall of the pressure relief valve cap below the internal thread.

[0005] Preferably, the outer diameter of the pressure relief valve core is larger than the diameter of the water inlet, but smaller than the diameter of the upper part of the constriction.

[0006] Preferably, a pressure sensor diaphragm is provided at the top of the pressure relief valve cap, and a pressure gauge is provided above the pressure sensor diaphragm.

[0007] Preferably, the pressure relief valve core is a cylindrical shape with an open top, and a pressure relief valve spring is installed inside it; the bottom surface of the pressure relief valve core abuts against the side wall of the constricted neck by the force applied by the pressure relief valve spring, and a seal is achieved through line contact under the action of the pressure relief valve spring.

[0008] Preferably, the bottom end of the pressure relief valve spring abuts against the bottom surface of the inner side of the pressure relief valve core, and the top end abuts against the bottom surface of the pressure sensor diaphragm.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. This utility model simplifies the sealing and pressure regulating structures by optimizing the structural design of the pressure relief valve. It abandons the traditional complex casting form and adopts a simpler component assembly; simultaneously, it utilizes the self-locking principle of threads for installation and fixation, reducing reliance on complex sealing structures and significantly lowering manufacturing costs. Compared with existing technologies, the production cost of this utility model is significantly reduced, making the pressure relief valve more competitive in the market and able to meet the cost control requirements of more users.

[0011] 2. This utility model uses a line contact method to control the opening and closing between the valve core and the valve body, which can more accurately control the sealing effect and reduce the failure rate caused by poor sealing. The spring compression is adjusted by adjusting the thread contact length. This adjustment method is simple and reliable, which further improves the reliability of the pressure relief valve. In actual use, it can effectively reduce failures caused by improper adjustment or component failure, and ensure the long-term stable operation of the pressure relief valve.

[0012] 3. Maintenance offers significant advantages. When maintenance is required, components such as the pressure relief valve body and valve cap can be disassembled using simple tools, allowing for quick location of the fault and greatly reducing maintenance time and difficulty. This ease of maintenance not only lowers maintenance costs but also improves equipment maintenance efficiency, reduces equipment downtime, and better ensures the continuity of production or use.

[0013] In summary, the adjustable pressure relief valve of this utility model has achieved significant improvements and advantages in terms of structure, cost, reliability, and ease of maintenance. It can effectively solve the problems existing in the current adjustable pressure relief valve and has broad application prospects and practical value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 Structural diagram;

[0016] In the diagram: pressure valve body-1, inlet-11, outlet-12, external thread-13, sealing ring groove-14, neck-15, pressure relief valve cap-2, valve cap internal thread-21, sealing surface-22, pressure sensor diaphragm-23, pressure gauge-24, pressure relief valve core-3, pressure relief valve spring-4, sealing ring-5. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments.

[0018] This utility model provides an adjustable pressure relief valve, including a lower pressure relief valve body 1 and an upper pressure relief valve cap 2. The pressure relief valve body 1 and the pressure relief valve cap 2 are internally provided with a lower pressure relief valve core 3 and an upper pressure relief valve spring 4. A sealing ring 5 is provided between the pressure relief valve body 1 and the pressure relief valve cap 2.

[0019] The interior of the pressure relief valve body 1 is hollow, with an inlet 11 at the center of its bottom and an outlet 12 at the middle of its side wall. The upper and lower ends of the outer wall of the pressure relief valve body 1 are respectively provided with external threads 13, and a sealing ring groove 14 is provided on the lower side of the upper external thread 13, in which a sealing ring 5 is embedded. The upper external thread 13 is threadedly connected and fixed to the pressure relief valve cap 2. The lower external thread 13 is connected to the centrifugal pump. The interior of the pressure relief valve body 1 has a necking 15 below the outlet 12, and a pressure relief valve core 3 is provided above the necking 15. The outer diameter of the pressure relief valve core 3 is larger than the diameter of the inlet 11, but smaller than the diameter of the upper part of the necking 15.

[0020] The pressure relief valve cap 2 is a cylindrical shape with an open bottom, and has an internal thread 21 on its inner wall, which is screwed and fixed to the external thread 13 on the upper part of the pressure relief valve body 1; at the same time, a sealing surface 22 is provided on the inner wall of the pressure relief valve cap 2 below the internal thread 21, which is used to cooperate with the sealing ring groove 14 to perform sealing operation.

[0021] A pressure sensor diaphragm 23 is provided at the top of the pressure relief valve cap 2, and a pressure gauge 24 is provided above the pressure sensor diaphragm 23.

[0022] The pressure relief valve core 3 is a cylindrical shape with an open top, and a pressure relief valve spring 4 is installed inside it. The bottom surface of the pressure relief valve core 3 is pressed against the side wall of the neck 15 by the force applied by the pressure relief valve spring 4, and a seal is achieved through line contact under the action of the pressure relief valve spring 4.

[0023] The bottom end of the pressure relief valve spring 4 abuts against the bottom surface of the inner side of the pressure relief valve core 3, and the top end abuts against the bottom surface of the pressure sensor diaphragm 23.

[0024] During use, when the pressure at the inlet 11 rises to a certain level, the pressure relief valve core 3 is subjected to pressure, the pressure relief valve spring 4 contracts, and the inlet 11 connects with the outlet 12. By adjusting the relative length of the connecting thread between the pressure relief valve cap 2 and the pressure relief valve body 1, the compression of the pressure relief valve spring 4 can be adjusted, thereby adjusting the pressure value at the pressure relief point.

[0025] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. An adjustable pressure relief valve, characterized in that: The device includes a lower pressure relief valve body (1) and an upper pressure relief valve cap (2). The pressure relief valve body (1) and the pressure relief valve cap (2) are internally equipped with a lower pressure relief valve core (3) and an upper pressure relief valve spring (4). A sealing ring (5) is provided between the pressure relief valve body (1) and the pressure relief valve cap (2). The pressure relief valve body (1) has an inlet (11) at its bottom center and an outlet (12) at the middle of its side wall. External threads (13) are provided at the upper and lower ends of the outer wall of the pressure relief valve body (1), and a sealing ring groove (14) is provided on the lower side of the upper external thread (13), with a sealing ring (5) embedded within it. The upper external thread (13) and the pressure relief valve cap (2) are connected... 2) Threaded connection and fixation; the lower external thread (13) is connected to the centrifugal pump; the interior of the pressure relief valve body (1) is hollow and is used to connect the inlet (11) and outlet (12). The interior of the pressure relief valve body (1) is provided with a neck (15) below the outlet (12), and a pressure relief valve core (3) is provided above the neck (15); the pressure relief valve cap (2) is a cylindrical shape with an open bottom, and a valve cap internal thread (21) is provided on the inner wall, and is screwed and fixed to the external thread (13) at the top of the pressure relief valve body (1); at the same time, a sealing surface (22) is provided on the inner wall of the pressure relief valve cap (2) below the valve cap internal thread (21).

2. The adjustable pressure relief valve according to claim 1, characterized in that: The outer diameter of the pressure relief valve core (3) is larger than the diameter of the inlet (11) and smaller than the diameter of the upper part of the constriction (15).

3. The adjustable pressure relief valve according to claim 1, characterized in that: The pressure relief valve cap (2) is provided with a pressure sensor diaphragm (23) at its top end, and a pressure gauge (24) is provided above the pressure sensor diaphragm (23).

4. The adjustable pressure relief valve according to claim 1, characterized in that: The pressure relief valve core (3) is a cylindrical shape with an open top, and a pressure relief valve spring (4) is installed inside it; the bottom surface of the pressure relief valve core (3) is pressed against the side wall of the neck (15) by the force applied by the pressure relief valve spring (4), and is sealed by line contact under the action of the pressure relief valve spring (4).

5. The adjustable pressure relief valve according to claim 3, characterized in that: The bottom end of the pressure relief valve spring (4) abuts against the bottom surface of the inner side of the pressure relief valve core (3), and the top end abuts against the bottom surface of the pressure sensor diaphragm (23).

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