A pressure relief structure and a pressure relief valve

Abstract

The present invention provides a pressure relief structure and a pressure unloading valve, which relate to the technical field of regulating valves and solve the technical problems that the structure of the existing pressure unloading valve is relatively complex and the installation is not convenient enough. The pressure relief structure includes a valve core and an elastic member. The elastic member abuts against and applies a force to the valve core. By directly acting on the valve core with only one elastic member, the purpose of applying a force opposite to the pressure regulating spring to the core body is achieved, ensuring that when the pressure regulating spring is compressed under too high pressure, the valve core moves under the action of the elastic member to open the valve port for pressure relief; the elastic member replaces the auxiliary spring and the clamping plate in the prior art, reduces the number of components, simplifies the structure of the pressure unloading valve, and makes the installation more convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to a pressure relief structure and a pressure unloading valve. Background Art

[0002] The pressure regulating and unloading valve is mainly used for over-high pressure protection in air conditioners. As Figure 1 shown, a common structure of the unloading valve includes a valve body 1a. The valve body is connected to an inlet pipe 3a and an outlet pipe 2a. A valve core 4a is installed inside the valve body. The valve core 4a acts on the lower surface of a diaphragm 6a through a clamping plate 15a and an auxiliary spring 5a. The diaphragm 6a is installed between an upper and a lower diaphragm fixing seats. The lower diaphragm fixing seat 14a is connected to the valve body 1a, and the upper diaphragm fixing seat 13a is connected to an adjusting cylinder 7a. A pressure regulating spring 12a is installed in the adjusting cylinder 7a. There is a plug 11a under the pressure regulating spring 12a. The plug 11a acts on the upper surface of the diaphragm 6a through a steel ball 9a. When the pressure of the air conditioning system does not reach the set opening pressure value, since the pressure regulating spring 12a acts on the diaphragm 6a and holds the valve core 4a, the unloading valve is in a closed state. When the pressure of the air conditioning system reaches the set value, at this time, the fluid flowing in from the inlet pipe 3a reaches the inside of the lower diaphragm fixing seat 14a from the valve cavity of the valve body 1a and acts on the diaphragm 6a. The fluid acting force is greater than the pressure of the pressure regulating spring 12a, causing the diaphragm 6a to bounce upward. The auxiliary spring 5a drives the valve core 4a to rise, instantly opening the valve port, so that the fluid passes through the valve port and flows to the low-pressure pipeline through the outlet pipe 2a to achieve the purpose of unloading. The unloading valve with the above structure adopts a mechanical structure, does not require signal transmission, has high reliability, and precise and stable control.

[0003] The applicant of the present invention has found that the prior art has at least the following technical problems:

[0004] At present, the structure of the pressure regulating and unloading valve for air conditioners has become mature, but the structure of the unloading valve is relatively complex and the installation is not convenient enough. Therefore, how to simplify the structure, facilitate the installation, and reduce the production cost has become an important topic for designers in this technical field. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure relief structure and a pressure unloading valve to solve the technical problems of the complex structure and inconvenient installation of the unloading valve in the prior art. The many technical effects that can be produced by the preferred technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A pressure relief structure provided by the present invention includes a valve core and an elastic member. The elastic member abuts against and applies a force to the valve core, and the direction of the applied force is opposite to the force applied by the pressure regulating spring of the pressure unloading valve to the valve core.

[0008] Optionally, the elastic member is an elastic clamping plate, which includes an annular sleeve and elastic claws. The elastic claws are in an arc structure, and a plurality of the elastic claws are arranged on the annular sleeve.

[0009] Optionally, the elastic claws are bent axially towards the annular sleeve to form an arc structure.

[0010] Optionally, the inner circumferential wall surface of the annular sleeve protrudes and extends and bends towards the periphery of the annular sleeve to form the elastic claws.

[0011] Optionally, the outer circle of the annular sleeve extends axially to form a supporting portion.

[0012] Optionally, the valve core includes a core plug and an end cap. The end cap is located at the top end of the core plug to form a clamping step; and the annular sleeve is sleeved on the core plug, and the elastic claws abut against the clamping step of the end cap.

[0013] Optionally, the annular sleeve and the elastic claws are integrally formed.

[0014] Optionally, a plurality of the elastic claws are evenly distributed on the annular sleeve.

[0015] A pressure relief valve provided by the present invention includes a pressure regulating spring, a valve body, and the pressure relief structure described in any one of the above. The elastic member is located in a receiving cavity formed between the valve core and the valve body.

[0016] Optionally, a fluid passage is formed between the valve core located in the valve cavity of the valve body and the valve body.

[0017] A pressure relief structure and a pressure relief valve provided by the present invention. The pressure relief structure includes a valve core and an elastic member. The elastic member abuts against and applies a force to the valve core. By directly acting on the valve core with only one elastic member, the purpose of applying a force opposite to the pressure regulating spring to the core body is achieved, ensuring that when the pressure regulating spring is compressed under excessive pressure, the valve core moves under the action of the elastic member to open the valve port for pressure relief; the elastic member replaces the auxiliary spring and the clamping plate in the prior art, reduces the number of components, simplifies the structure of the pressure relief valve, and makes the installation more convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a pressure relief valve in the prior art;

[0020] Figure 2 It is a schematic structural diagram of a pressure relief valve provided by a specific embodiment of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the first elastic clamping plate provided by a specific embodiment of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a valve core provided by a specific embodiment of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the connection between the first elastic clamping plate of the present invention and the valve core and the valve body;

[0024] Figure 6 It is a schematic structural diagram of a valve body provided by a specific embodiment of the present invention;

[0025] Figure 7 It is a schematic structural diagram of the second elastic clamping plate provided by a specific embodiment of the present invention;

[0026] Figure 8 It is a schematic structural diagram of the connection between the second elastic clamping plate of the present invention and the valve core and the valve body;

[0027] Figure 9 is Figure 1 a schematic structural diagram of the valve body in the prior art;

[0028] Figure 10 is Figure 1 a schematic structural diagram of the valve core in the prior art.

[0029] In the figure, 1 is the valve body; 101 is the air flow channel; 2 is the lower membrane fixing seat; 3 is the upper membrane fixing seat; 4 is the inlet pipe; 5 is the outlet pipe; 6 is the pressure regulating spring; 7 is the valve core; 71 is the core plug; 72 is the end cap; 8 is the diaphragm; 9 is the diaphragm top plug; 10 is the steel ball; 11 is the top plug; 12 is the adjusting plug; 13 is the adjusting cylinder; 14 is the elastic clamping plate; 141 is the annular sleeve; 142 is the elastic claw; 143 is the supporting part. Specific Embodiment

[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope protected by the present invention.

[0031] The present invention provides a pressure relief structure, including a valve core and an elastic member. The elastic member abuts against and applies a force to the valve core, and the direction of the applied force is opposite to the force exerted on the valve core by the pressure regulating spring of the pressure relief valve.

[0032] The elastic member presses against and applies force to the valve core. By directly acting on the valve core with only one elastic member, the purpose of applying a force opposite to that of the pressure regulating spring to the core body is achieved, ensuring that when the pressure regulating spring is compressed under excessive pressure, the valve core moves under the action of the elastic member to open the valve port for pressure relief. The elastic member replaces the auxiliary spring and the clamping plate in the prior art, reducing the number of components, simplifying the structure of the unloading valve, and making the installation more convenient and fast.

[0033] As an optional implementation manner, the elastic member is an elastic clamping plate. The elastic clamping plate includes an annular sleeve and elastic claws. The elastic claws are in an arc structure, and a plurality of elastic claws are arranged on the annular sleeve.

[0034] Using the elastic clamping plate facilitates installation and fixation while providing a resilience force. The annular sleeve serves as a fixing part, and the elastic claws provide the elastic force.

[0035] As an optional implementation manner, as Figure 7 shown, the elastic claws are bent axially towards the annular sleeve to form an arc structure. The arc structure makes the elastic claws have higher strength and the release of elastic potential energy is more stable.

[0036] As an optional implementation manner, as Figure 3 shown, the inner circumferential wall surface of the annular sleeve bulges and extends and bends towards the periphery of the annular sleeve to form elastic claws.

[0037] As an optional implementation manner, the outer circle of the annular sleeve extends axially to form a support part, as shown in Figure 7. The support part 143 acts on the boss part 111 of the valve seat 1, and the elastic claws 142 act on the end cap 72 of the valve core 7, as shown in Figure 8 . The setting of the support part can make the connection between the elastic member and the valve core and the valve body more reliable and have higher reliability.

[0038] As an optional implementation manner, as Figure 4 shown, the valve core includes a core plug and an end cap. The end cap is located at the top of the core plug to form a clamping step; and the annular sleeve is sleeved on the core plug, and the elastic claws abut against the clamping step of the end cap, for reliability, as shown in Figure 5 .

[0039] As an optional implementation manner, the annular sleeve and the elastic claws are integrally formed, with high strength and long service life.

[0040] As an optional implementation manner, a plurality of elastic claws are evenly distributed on the annular sleeve, and the forces exerted by the plurality of elastic claws on the valve core are uniform, and no skewing will occur.

[0041] The present invention provides an unloading valve, which includes a pressure regulating spring, a valve body, and a pressure relief structure as described in any one of the above. The elastic member is located in the accommodation cavity formed between the valve core and the valve body.

[0042] As an optional implementation manner, a fluid passage is formed between the valve core located in the valve cavity of the valve body and the valve body.

[0043] Specifically, as Figure 2 shown, the unloading valve includes a valve body 1. The valve body is connected to an inlet pipe 5 and an outlet pipe 4. A valve core 7 is installed inside the valve body. The valve core 7 acts on the lower surface of a diaphragm 8 by the elastic force of an elastic clamping plate 14. The diaphragm 8 is installed between upper and lower diaphragm fixing seats. The lower diaphragm fixing seat 2 is connected to the valve body 1, and the upper diaphragm fixing seat 3 is connected to an adjusting cylinder 13. A pressure regulating spring 6 is installed in the adjusting cylinder 13. There is a plug 11 under the pressure regulating spring 6. The plug 11 acts on the upper surface of the diaphragm 8 through a steel ball 10. When the pressure of the air conditioning system does not reach the set opening pressure value, the pressure regulating spring 6 acts on the diaphragm 8 and holds the valve core 7, and the unloading valve is in a closed state; when the pressure of the air conditioning system reaches the set value, at this time, the fluid flowing in from the inlet pipe 5 reaches inside the lower diaphragm fixing seat 2 from the valve cavity 11a of the valve body 1 and acts on the diaphragm 8. The fluid acting force is greater than the pressure of the pressure regulating spring 6, causing the diaphragm 8 to spring upward. The elastic claws 142 of the elastic clamping plate 14 act on the end cap 72 of the valve core 7, instantly opening the valve port, and enabling the fluid to flow through the valve port and out through the outlet pipe 2 to the low-pressure pipeline, realizing unloading. The structure of the valve core 7 of the unloading valve of the present invention ( Figure 4 ) relative to the structure of the valve core of a common unloading valve ( Figure 10 ) removes the valve core step portion 41a and adds an end cap 72. On the premise of ensuring the unloading function of the unloading valve, the elastic clamping plate 14 is used to replace the auxiliary spring 5a and the clamping plate 15a, and the elastic clamping plate 14 is easily installed on the valve core 7, achieving the effects of reducing parts, simplifying the structure, and facilitating installation. See Figure 6 and Figure 9 , compared with the valve seat of a common unloading valve, the valve seat 1 of the present invention has a reduced outer diameter (D2 < D1) and an increased internal fluid passage 101, which can reduce the raw materials of the valve seat and lower the production cost.

[0044] In the description of the invention, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A pressure relief valve, characterized in that, It includes a pressure regulating spring (6), a valve body (1) and a pressure relief structure. The pressure relief structure includes a valve core (7) and an elastic member. The pressure regulating spring (6) acts on a diaphragm and presses against the valve core (7). The elastic member abuts against and applies a force to the valve core (7), and the direction of the force applied is opposite to the force exerted by the pressure regulating spring (6) on the valve core. The pressure regulating spring (6) and the elastic member are located on both sides of the diaphragm (8). The elastic member is an elastic clamping plate (14). The elastic clamping plate includes an annular sleeve (141) and elastic claws (142). The elastic claws (142) are arc-shaped structures, and a plurality of the elastic claws (142) are arranged on the annular sleeve (141). The inner wall surface of the annular sleeve (141) protrudes and extends and bends towards the periphery of the annular sleeve (141) to form the elastic claws (142). The outer circle of the annular sleeve (141) extends along its axial direction to form a support portion (143). The valve core (7) includes a core plug (71) and an end cap (72). The end cap (72) is located at the top of the core plug (71) to form a clamping step. And the annular sleeve (141) is sleeved on the core plug (71), and the elastic claws (142) abut against the clamping step of the end cap (72).

2. The pressure relief valve according to claim 1, characterized in that, The annular sleeve (141) and the elastic claws (142) are integrally formed.

3. The pressure relief valve according to claim 1, characterized in that, A plurality of the elastic claws (142) are evenly distributed on the annular sleeve (141).

4. The pressure relief valve according to claim 1, characterized in that, The elastic member is located in an accommodation cavity formed between the valve core (7) and the valve body (1).

5. The pressure relief valve according to claim 4, characterized in that, A fluid passage (111) is formed between the valve core (7) located in the valve cavity of the valve body (1) and the valve body (1).

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