Hose assembly with pressure balancing function
By introducing a balancing valve with pressure balancing function into the hose system, the problems of negative pressure vacuum, water hammer and zero pressure difference during the unloading process are solved, improving the safety and ease of operation of the system, ensuring complete unloading and reducing safety hazards.
Patent Information
- Application Number
- CN202520352280.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-28
AI Technical Summary
Traditional hose systems suffer from problems such as negative pressure vacuum, water hammer, incomplete unloading, and inability to meet zero pressure difference requirements during the unloading process, resulting in insufficient safety, environmental friendliness, and ease of operation, as well as potential safety hazards.
A hose assembly with pressure balancing function was designed, including a hose and a connector. It has a flow channel and a balancing valve inside. The check valve automatically opens under negative pressure to allow outside gas to enter the hose, ensuring complete unloading. It automatically closes under positive pressure to prevent liquid leakage.
This system improves the safety and ease of operation of the hose system, reduces the risk to operators, meets the zero pressure difference requirement, and enhances the thoroughness of unloading and the environmental friendliness of the system.
Smart Images
Figure CN223924188U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of industrial pipeline systems, specifically relating to a hose assembly with pressure balancing function. Background Technology
[0002] In industrial piping systems, flexible hose connections are a common method of fluid transport, widely used in chemical, petroleum, and food processing industries. Flexible hose systems typically consist of a hose and fittings at both ends, offering advantages such as flexible installation and high adaptability. However, in practical use, flexible hose systems often face a series of technical problems, especially during unloading, where negative pressure vacuum and water hammer pose serious threats to system safety, environmental friendliness, and the health of operators.
[0003] 1. Negative pressure vacuum problem
[0004] During hose unloading, when the valve is closed, the lack of a pressure compensation mechanism in the upstream pipeline causes negative pressure within the hose, preventing complete emptying of residual liquid. This negative pressure can cause delamination or even flattening of the hose's inner layer and deformation of pipeline system accessories (such as pumps, valves, and pipes), potentially even jeopardizing the structural integrity of the tank. Furthermore, closing the valve while a pump is operating upstream creates a disruption in liquid transport within the pipeline, generating significant negative pressure that prevents proper drainage. To remove residual liquid, operators must disassemble the pipeline flanges, increasing operational complexity and potentially leading to pipeline leaks and posing a substantial safety risk.
[0005] 2. Water hammer phenomenon
[0006] Water hammer is a pressure surge caused by a sudden interruption of liquid flow in a pipeline (such as a valve closing rapidly). This pressure surge impacts hoses and piping systems, especially at the liquid-flowing ends of the hoses, leading to hose delamination, rupture, and even damage to pipeline accessories. Water hammer not only affects the normal operation of the system but can also cause safety accidents, especially when transporting flammable, explosive, or toxic media, where the consequences are particularly severe.
[0007] 3. Incomplete unloading
[0008] Because of the negative pressure in the closed pipeline after the valve is shut off, the liquid in the hose cannot be completely drained, resulting in incomplete unloading. Residual liquid not only affects the next material transport but may also pose environmental and safety hazards. For example, in the chemical industry, residual toxic or corrosive liquids may leak, polluting the environment or endangering the health of operators.
[0009] 4. The zero differential pressure requirement cannot be met.
[0010] In certain specialized applications (such as high-precision fluid transport or clean environments), piping systems are required to operate with zero differential pressure. However, traditional hose systems, lacking effective pressure compensation mechanisms, cannot meet this requirement, thus limiting their application in high-precision fields.
[0011] 5. Safety hazards
[0012] Without flame arresters, hose systems pose significant safety hazards when transporting flammable and explosive media. Leaks or static sparks could ignite fires or explosions. Furthermore, the inability to monitor pressure differentials within the pipeline in real time increases the risk of misjudgments by operators, leading to leaks and further complicating safety procedures.
[0013] 6. Operator risks
[0014] When disassembling pipes or handling residual liquids, operators may come into direct contact with toxic, corrosive, or flammable and explosive media, facing risks of poisoning, burns, or even explosions. Furthermore, because the amount of residual liquid in the hose cannot be accurately determined, improper operation during the cleanup process may lead to accidents.
[0015] Currently, traditional hose systems have significant shortcomings in dealing with negative pressure vacuum, water hammer, incomplete unloading, and zero pressure differential requirements. Therefore, there is an urgent need for a new type of hose assembly that can effectively solve these problems and improve the reliability and safety of the system. Utility Model Content
[0016] The problem to be solved by this utility model is to provide a hose assembly with pressure balancing function, which can effectively solve problems such as negative pressure vacuum, water hammer, incomplete unloading and zero pressure difference requirements, thereby improving the safety, environmental friendliness and operation convenience of the pipeline system and reducing the risk to operators; and the pressure balancing function can be flexibly selected to be turned on or off according to actual needs.
[0017] To address the aforementioned technical problems, this utility model provides a hose assembly with pressure balancing function, comprising a hose and a connector. The hose has an internal flow channel and is connected to the connector. The connector is equipped with a balancing valve, which includes a valve body, a valve stem, and a valve core. The valve body has a through-hole extending vertically. This through-hole comprises a first through-hole section, a second through-hole section, a third through-hole section, and a fourth through-hole section from top to bottom. The diameter of the first through-hole section is equal to the diameter of the second through-hole section, the diameter of the second through-hole section is larger than the diameter of the third through-hole section, and the diameter of the third through-hole section is smaller than the diameter of the first through-hole section. The valve body has a four-hole section with a diameter of 100mm; the fourth through-hole section is connected to the flow channel; the valve body has an air inlet hole on its side wall that connects to the second through-hole section; the upper end of the valve stem is fixedly connected to a screw head, which is threadedly connected to the first through-hole section; the lower end of the valve stem is fixedly connected to the valve core, and rotating the screw head allows the valve stem to push the valve core to move within the second and third through-hole sections; the outer diameter of the valve core is smaller than the diameter of the second through-hole section and can form a dynamic sealing structure with the third through-hole section; the fourth through-hole section has a check valve mechanism to prevent fluid in the flow channel from leaking to the outside through the valve body through-hole.
[0018] As a preferred embodiment of this utility model, the second through hole section has a positioning screw hole on one end sidewall near the first through hole section, and the positioning screw hole is threadedly connected to a positioning screw that can extend into the second through hole section.
[0019] As a preferred embodiment of this utility model, the valve stem has a radially protruding ring on the outer side of one end near the valve core. When the protruding ring abuts against the positioning screw, the valve core moves to the upper limit position; when the protruding ring abuts against the step formed by the second through hole section and the third through hole section, the valve core moves to the lower limit position.
[0020] As a preferred embodiment of this utility model, a sealing ring is provided on the outer periphery of the valve core.
[0021] As a preferred embodiment of this utility model, the check valve mechanism includes a check ball and a spring, wherein the check ball, under the elastic force of the spring, blocks the lower end port of the third through hole section.
[0022] As a preferred embodiment of this utility model, the third through hole section and the fourth through hole section are transitioned by a conical hole.
[0023] As a preferred embodiment of this utility model, the fourth through hole section is provided with a support retaining ring at the end away from the third through hole section, the lower end of the spring abuts against the support retaining ring, and the upper end of the spring is connected to the check ball.
[0024] As a preferred embodiment of this utility model, a fire-resistant mesh is provided between the spring and the support retaining ring.
[0025] The hose assembly with pressure balancing function implemented in this utility model embodiment has the following advantages compared with the prior art:
[0026] When the screw head is screwed in and pushes the valve core to seal with the third through-hole section, the pressure balancing function of the hose assembly is in a shielded state. When the screw head is screwed out and pulls the valve core to separate from the third through-hole section, the pressure balancing function of the hose assembly is in an open state. When the accumulation of negative pressure causes hose pressure fluctuations, fluid blockage, or even flattening, unscrewing the screw head will open the pressure balancing function of the hose assembly. The hose assembly will automatically open under a certain negative pressure through the built-in mechanism of the balancing valve, namely the check valve mechanism, which connects the valve body through-hole and the guide channel. This allows external gas to be guided into the guide channel through the air inlet and valve body through-hole, achieving the purpose of air intake into the hose. This allows for real-time control of the delivery pressure in the guide pipe, ensuring complete unloading. When the internal pressure of the hose reaches the preset positive pressure value, the balancing valve will automatically close under the action of the check valve mechanism, stopping the intake of air into the hose. At the same time, it ensures that the liquid inside the pipe will not be discharged through the valve body through-hole and air inlet, thereby improving the safety, environmental friendliness, and ease of operation of the pipeline system and reducing the risk to operators. Attached Figure Description
[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.
[0028] Figure 1 This is a schematic diagram of the structure of the hose assembly with pressure balancing function according to an embodiment of the present invention;
[0029] Figure 2 This is a front view of the balancing valve in an embodiment of this utility model;
[0030] Figure 3 It is at Figure 2 The cross-sectional view along direction AA in the structure shown.
[0031] Marked in the image:
[0032] 1. Hose; 2. Connector; 3. Flow channel; 4. Balance valve; 41. Valve body; 42. Valve stem; 43. Valve core; 44. Valve body through hole; 44. First through hole section 44a; 44b. Second through hole section 44c. Third through hole section 44d. Fourth through hole section 44d. Conical hole 44e. Air inlet 45. Screw head 46. Check mechanism 47. Check ball 471. Spring 472. Positioning screw hole 48. Positioning screw 49. Convex ring 410. Step 411. Sealing ring 412. Support retaining ring 413. Flame arrestor mesh 414. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0035] like Figures 1 to 3 As shown, this is a preferred embodiment of the present invention.
[0036] A hose assembly with pressure balancing function includes a hose 1 and a connector 2. The hose 1 is preferably a composite hose with an internal flow channel 3. The hose 1 is connected to the connector 2, which is equipped with a balancing valve 4. The balancing valve 4 includes a valve body 41, a valve stem 42, and a valve core 43. The valve body 41 has a through-hole 44 extending vertically. The through-hole 44 includes, from top to bottom, a first through-hole section 44a, a second through-hole section 44b, a third through-hole section 44c, and a fourth through-hole section 44d. The diameter of the first through-hole section 44a is equal to the diameter of the second through-hole section 44b, the diameter of the second through-hole section 44b is larger than the diameter of the third through-hole section 44c, and the diameter of the third through-hole section 44c is smaller than the diameter of the fourth through-hole section 44d. 4d is connected to the flow channel 3; the side wall of the valve body 41 is provided with an air inlet 45 that connects to the second through hole section 44b, and six air inlets 45 are evenly distributed along the outer periphery of the valve body 41; the upper end of the valve stem 42 is fixedly connected with a screw head 46, which is threadedly connected to the first through hole section 44a; the lower end of the valve stem 42 is fixedly connected to the valve core 43, and when the screw head 46 is rotated, the valve stem 42 can push the valve core 43 to move within the second through hole section 44b and the third through hole section 44c; the outer diameter of the valve core 43 is smaller than the diameter of the second through hole section 44b, and it can form a dynamic sealing structure with the third through hole section 44c; the fourth through hole section 44d is provided with a check valve mechanism 47 to prevent fluid in the flow channel 3 from leaking to the outside through the valve body through hole 44.
[0037] The hose assembly with pressure balancing function in this embodiment of the utility model is mainly installed in fluid pipelines, liquid containers and conveying pipelines with differential pressure protection.
[0038] When there is a relative negative pressure inside the fluid pipeline or container (i.e., inside the flow channel 3), the screw head 46 can be quickly unscrewed to the end without falling out. At this time, the valve core 43 separates from the third through-hole section 44c, and the negative pressure inside the pipe is greater than the pre-tightening pressure of the check mechanism 47 (i.e., the negative pressure inside the pipe needs to overcome the pre-tightening force of the spring on the check ball in the following text), so that the check mechanism 47 opens, opening the valve body through-hole 44 and the flow channel 3. Outside air enters the second through-hole section 44b from the air inlet 45, and enters the interior of the flow channel 3 through the third through-hole section 44c and the fourth through-hole section 44d. Under the increase of air pressure inside the pipe, the crushed and residual material is discharged from the outside of the pipe in time, ensuring safety.
[0039] When the fluid pipeline or container (i.e., the flow channel 3) is under relative positive pressure protection, the check mechanism 47 in the balance valve 4 blocks the lower end port of the third through-hole section 44c, ensuring that the liquid in the pipe will not be discharged through the balance valve 4. Even if the screw head 46 is unscrewed under positive pressure to separate the valve core 43 from the third through-hole section 44c, the liquid in the pipe will not be discharged, ensuring that the liquid in the pipeline will not flow out of the balance valve 4.
[0040] Therefore, according to the embodiment of the present invention, when the screw head 46 is screwed in and pushes the valve core 43 to seal with the third through hole section 44c, the pressure balancing function of the hose assembly is in a shielded state; when the screw head 46 is screwed out and pulls the valve core 43 to separate from the third through hole section 44c, the pressure balancing function of the hose assembly is in an open state; when the accumulation of negative pressure causes pressure fluctuations, fluid blockage, or even flattening of the hose 1, the screw head 46 is unscrewed to open the pressure balancing function of the hose assembly. The hose assembly, through the built-in mechanism of the balance valve 4, namely the check mechanism 47 in the balance valve 4, ... The valve automatically opens under a certain negative pressure, connecting the valve body through-hole 44 and the guide channel 3. This allows external gas to enter the guide channel 3 through the air inlet 45 and the valve body through-hole 44, thus achieving the purpose of air intake into the hose 1. This allows for real-time control of the delivery pressure in the guide pipe, ensuring complete unloading. When the internal pressure of the hose 1 reaches the preset positive pressure value, the balance valve 4 automatically closes under the action of the check mechanism 47, stopping the intake of air into the hose 1. At the same time, it ensures that the liquid in the pipe will not be discharged along the valve body through-hole 44 and the air inlet 45, thereby improving the safety, environmental friendliness, and ease of operation of the pipeline system and reducing the risk to operators.
[0041] For example, the second through-hole section 44b has a positioning screw hole 48 on one side wall near the first through-hole section 44a. The positioning screw hole 48 is threaded with a positioning screw 49 that can extend into the second through-hole section 44b. The valve stem 42 has a radially protruding convex ring 410 on the outer side near the valve core 43. When the convex ring 410 abuts against the positioning screw 49, the valve core 43 moves to the upper limit position to prevent the valve core 43 from moving too high and to prevent the screw head 46 from moving too high and falling out. When the convex ring 410 abuts against the step 411 formed by the second through-hole section 44b and the third through-hole section 44c, the valve core 43 moves to the lower limit position to ensure that the valve core 43 does not move too low, thereby maintaining a sealing contact with the third through-hole section 44c.
[0042] For example, a sealing ring 412 is provided on the outer periphery of the valve core 43 to ensure the sealing between the valve core 43 and the third through hole section 44c.
[0043] For example, the check valve mechanism 47 includes a check ball 471 and a spring 472. The check ball 471, under the elastic force of the spring 472, seals the lower end of the third through-hole section 44c, thereby achieving unidirectional flow and automatic sealing. The elastic force of the spring 472 ensures that the check ball 471 remains sealed under normal conditions, while also responding rapidly under negative pressure to achieve ventilation. In this embodiment, the spring 472 is preferably a conical spring.
[0044] For example, the third through-hole section 44c and the fourth through-hole section 44d are transitioned by a conical hole 44e. The shape of the conical hole 44e matches the spherical surface of the check ball 471, which can better achieve a seal and effectively prevent fluid (i.e., pipeline liquid) from leaking in the transition area between the third through-hole section 44c and the fourth through-hole section 44d, thus ensuring the sealing performance of the check mechanism 47.
[0045] For example, the fourth through-hole section 44d has a support retaining ring 413 at the end away from the third through-hole section 44c. The lower end of the spring 472 abuts against the support retaining ring 413, and the upper end of the spring 472 is connected to the check ball 471. In this way, the support retaining ring 413 provides a stable support point for the spring 472, ensuring that the spring will not shift or tilt during operation.
[0046] For example, a fire-resistant mesh 414 is provided between the spring 472 and the support retaining ring 413 to prevent external fire sources from seeping into the pipe, thereby enhancing safety and explosion protection and meeting the needs of flammable and explosive environments.
[0047] In the description of this utility model, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0048] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A hose assembly with pressure equalization function, comprising a hose and a connector, an internal flow channel is arranged in the hose, and the hose is connected with the connector, characterized in that: The balance valve is arranged on the joint, The balance valve comprises a valve body, a valve rod and a valve core, the valve body is provided with a through hole in the valve body from top to bottom, the through hole comprises a first hole section, a second hole section, a third hole section and a fourth hole section, the hole diameter of the first hole section is equal to that of the second hole section, the hole diameter of the second hole section is greater than that of the third hole section, and the hole diameter of the third hole section is smaller than that of the fourth hole section; the fourth hole section is in communication with the flow guide channel; the side wall of the valve body is provided with an air inlet hole in communication with the second hole section; The upper end of the valve rod is fixedly connected with a screw head, the screw head is in threaded connection with the first hole section; the lower end of the valve rod is fixedly connected with the valve core, and when the screw head is rotated, the valve rod can push the valve core to move in the second hole section and the third hole section; the outer diameter of the valve core is smaller than the hole diameter of the second hole section and can form a dynamic sealing structure with the third hole section; the fourth hole section is provided with a check mechanism for preventing the fluid in the flow guide channel from leaking to the outside through the through hole of the valve body.
2. The pressure balanced hose assembly of claim 1, wherein: The second hole section is provided with a positioning screw hole on the side wall of one end close to the first hole section, and the positioning screw hole is in threaded connection with a positioning screw capable of extending into the second hole section.
3. The pressure balanced hose assembly of claim 2, wherein: The valve rod is provided with a convex ring protruding in the radial direction on the outer side of one end close to the valve core, when the convex ring abuts against the positioning screw, the valve core moves to the upper limit position; when the convex ring abuts against the step formed by the second hole section and the third hole section, the valve core moves to the lower limit position.
4. The pressure balanced hose assembly of claim 1, wherein: The outer periphery of the valve core is provided with a sealing ring.
5. The pressure equalizing function-equipped hose assembly according to any one of claims 1 to 4, characterized in that: The check mechanism comprises a check ball and a spring, and the check ball is blocked at the lower end port of the third hole section under the elastic force of the spring.
6. The pressure balanced hose assembly of claim 5, wherein: The third hole section and the fourth hole section are transitioned through a conical hole.
7. The pressure balanced hose assembly of claim 5, wherein: The fourth hole section is provided with a support stop ring at one end away from the third hole section, the lower end of the spring abuts against the support stop ring, and the upper end of the spring is connected with the check ball.
8. The pressure balanced hose assembly of claim 7, wherein: A fire-retardant mesh is arranged between the spring and the support stop ring.