Dynamic differential pressure balance valve

Abstract

The utility model is suitable for the technical field of balance valves, and provides a dynamic differential pressure balance valve which comprises a valve body, a water inlet is formed in one side of the valve body, a water outlet is formed in the other side of the valve body, a pressure inlet is formed in one side of the upper end of the valve body, a diaphragm cavity is formed in the valve body, and a pressure sensing diaphragm is arranged on the inner wall of the diaphragm cavity. The upper end of the valve body is connected with a protective sleeve through a connecting assembly, an adjusting nut is arranged in the protective sleeve, a limiting assembly is arranged between the adjusting nut and the protective sleeve in a matched mode, a locking assembly is arranged at the lower end of the outer wall of the protective sleeve in a matched mode, and the inner wall of the adjusting nut is sleeved with a spring pull rod in a threaded mode. The lower end of the spring pull rod is fixedly connected with a connecting rod, the lower end of the connecting rod is fixedly connected with an adjusting valve element, and an adjusting spring is arranged between the adjusting nut and the upper end of the valve body in a matched mode. The utility model has the advantages that the pressure difference can be adjusted and locked, and the pressure difference can be adjusted in a self-adaptive manner and is not changed.

Description

TECHNICAL FIELD

[0001] The utility model relates to balanced valve technical field especially relates to a dynamic pressure difference balanced valve. BACKGROUND

[0002] In a fluid control system, maintaining stable pressure difference before the pressure difference valve is crucial for the normal operation of the system.

[0003] However, the traditional pressure difference balanced valve often has difficulty in maintaining stable pressure difference when facing changes in system pressure or flow, thereby affecting the stability and efficiency of the system.

[0004] Therefore, in view of the above status, it is urgent to develop a dynamic pressure difference balanced valve to overcome the deficiencies in current practical applications. SUMMARY

[0005] The purpose of the embodiments of the utility model lies in providing a dynamic pressure difference balanced valve, aiming at solving the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] A dynamic pressure difference balanced valve, comprising a valve body, a water inlet is formed on one side of the valve body, a water outlet is formed on the other side of the valve body, a pressure inlet is arranged on one side of the upper end of the valve body, a diaphragm cavity is arranged in the valve body, a pressure-sensitive diaphragm is arranged on the inner wall of the diaphragm cavity, a protective sleeve is connected to the upper end of the valve body through a connecting assembly, an adjusting nut is arranged in the protective sleeve, a limiting assembly is arranged between the adjusting nut and the protective sleeve in a matched mode, the protective sleeve drives the adjusting nut to rotate and lift through the limiting assembly, a locking assembly is arranged on the lower end of the outer wall of the protective sleeve in a matched mode, a spring pull rod is threadedly connected to the inner wall of the adjusting nut, a connecting rod is fixedly connected to the lower end of the spring pull rod, an adjusting valve core is fixedly connected to the lower end of the connecting rod and penetrates through the pressure-sensitive diaphragm, an adjusting spring is arranged between the adjusting nut and the upper end of the valve body in a matched mode, and the adjusting spring is arranged on the outer wall of the spring pull rod.

[0008] Further technical scheme, the connecting assembly includes a clamping groove and a clamping head, a plurality of clamping heads are fixedly connected to the upper end of the valve body in a uniformly distributed mode, a clamping groove is fixedly arranged on the inner wall of the lower end of the protective sleeve, and the clamping groove is rotatably connected to the clamping head.

[0009] Further technical scheme, the limiting assembly includes a limiting rod and a first limiting groove, a plurality of first limiting grooves are formed on the outer wall of the protective sleeve in a uniformly distributed mode, a plurality of limiting rods are fixedly connected to the outer wall of the adjusting nut in a uniformly distributed mode, the limiting rod and the first limiting groove are one-to-one corresponding, and the limiting rod abuts against the inner wall of the corresponding first limiting groove.

[0010] Further technical solutions, the locking assembly includes a locking sleeve, a limiting strip, a lock tongue and a second limiting groove, the second limiting groove is fixedly arranged on the outer wall of the protective sleeve, the locking sleeve is slidably connected to the outer wall of the protective sleeve, the lower end of the inner wall of the locking sleeve is fixedly connected with the lock tongue, and the lock tongue is slidably connected with the inner wall of the first limiting groove, and the upper end of the inner wall of the locking sleeve is fixedly connected with the limiting strip, when the protective sleeve rotates, the limiting strip is rotatably connected with the inner wall of the second limiting groove.

[0011] In summary, the embodiments of the present application have the following advantages compared with the prior art:

[0012] 1、The protective sleeve can rotate relative to the connecting assembly by sliding the locking sleeve upwards, then the locking sleeve drives the lock tongue to slide upwards along the first limiting groove to disengage the clamping joint, then the protective sleeve is rotated, the protective sleeve drives the locking sleeve to rotate through the cooperation of the first limiting groove and the lock tongue, then the first limiting groove drives the limiting rod to rotate around the axis of the protective sleeve, then the limiting rod drives the adjusting nut to rotate and lift along the spring pull rod, so as to adjust the compression amount of the adjusting spring, realize the compression or relaxation of the adjusting spring, and then change the adjusting spring pressure to realize differential pressure adjustment.

[0013] 2、The clamping joint can limit the rotation of the lock tongue around the axis of the protective sleeve, and then limit the rotation of the locking sleeve around the axis of the protective sleeve, so as to limit the rotation of the protective sleeve, and then lock the differential pressure.

[0014] 3、By setting the adjusting spring pressure, when the system pressure changes within a certain range, the differential pressure is self-adaptively adjusted to be constant, and when the valve front flow changes within a certain range, the differential pressure is self-adaptively adjusted to be constant.

[0015] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of part of the structure of the present application;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the present application;

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the protective sleeve part of the present application;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the locking assembly of the present application.

[0021] In the diagram: 1. Valve body; 2. Protective sleeve; 3. Spring rod; 4. Connecting rod; 5. Adjusting valve core; 6. Pressure-sensing diaphragm; 7. Inlet; 8. Outlet; 9. Pressure inlet; 10. Adjusting nut; 11. Adjusting spring; 12. Limiting assembly; 121. Limiting rod; 122. First limiting groove; 13. Connecting assembly; 131. Snap-fit ​​groove; 132. Snap-fit ​​connector; 14. Diaphragm cavity; 15. Locking assembly; 151. Locking sleeve; 152. Limiting strip; 153. Locking tongue; 154. Second limiting groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] like Figures 1-5 As shown, this utility model embodiment provides a dynamic differential pressure balancing valve, including a valve body 1. The valve body 1 has an inlet 7 on one side and an outlet 8 on the other side. A pressure inlet 9 is located on the upper side of the valve body 1. A diaphragm cavity 14 is provided inside the valve body 1, and a pressure-sensing diaphragm 6 is provided on the inner wall of the diaphragm cavity 14. A protective sleeve 2 is connected to the upper end of the valve body 1 via a connecting assembly 13. An adjusting nut 10 is provided inside the protective sleeve 2, and the adjusting nut 10 and the protective sleeve 2 are fitted together. The limiting component 12 drives the adjusting nut 10 to rotate and rise through the protective sleeve 2. The lower end of the outer wall of the protective sleeve 2 is fitted with a locking component 15. The inner wall of the adjusting nut 10 is threaded with a spring rod 3. The lower end of the spring rod 3 is fixedly connected to a connecting rod 4. The lower end of the connecting rod 4 passes through the pressure-sensitive diaphragm 6 and is fixedly connected to an adjusting valve core 5. An adjusting spring 11 is fitted between the adjusting nut 10 and the upper end of the valve body 1, and the adjusting spring 11 is fitted on the outer wall of the spring rod 3.

[0025] like Figures 2-4 As shown, the connecting assembly 13 includes a snap-fit ​​groove 131 and a snap-fit ​​connector 132; a plurality of evenly distributed snap-fit ​​connectors 132 are fixedly connected to the upper end of the valve body 1, and a snap-fit ​​groove 131 is fixedly provided on the inner wall of the lower end of the protective sleeve 2, and the snap-fit ​​groove 131 is rotatably connected to the snap-fit ​​connector 132.

[0026] In practical applications, when the protective sleeve 2 is rotated, the inner wall of the snap-fit ​​groove 131 rotates relative to the snap-fit ​​connector 132.

[0027] like Figures 1-4As shown, the limiting component 12 includes a limiting rod 121 and a first limiting groove 122; the outer wall of the protective sleeve 2 is provided with a plurality of evenly distributed first limiting grooves 122, and the outer wall of the adjusting nut 10 is fixedly connected with a plurality of evenly distributed limiting rods 121, the limiting rods 121 and the first limiting grooves 122 are corresponding one to one, and the limiting rods 121 abut against the inner wall of the corresponding first limiting grooves 122.

[0028] In practical applications, when the protective sleeve 2 is rotated, the protective sleeve 2 drives the first limiting groove 122 to rotate, and then the first limiting groove 122 drives the limiting rod 121 to rotate around the axis of the protective sleeve 2. After that, the limiting rod 121 drives the adjusting nut 10 to rotate and rise along the spring rod 3, thereby adjusting the compression of the adjusting nut 10 on the adjusting spring 11.

[0029] like Figures 1-5 As shown, the locking assembly 15 includes a locking sleeve 151, a limiting strip 152, a locking tongue 153, and a second limiting groove 154. The outer wall of the protective sleeve 2 is fixedly provided with the second limiting groove 154, and the locking sleeve 151 is slidably sleeved on the outer wall of the protective sleeve 2. The lower end of the inner wall of the locking sleeve 151 is fixedly connected to the locking tongue 153, and the locking tongue 153 is slidably connected to the inner wall of the first limiting groove 122. The upper end of the inner wall of the locking sleeve 151 is fixedly connected to the limiting strip 152. When the protective sleeve 2 rotates, the limiting strip 152 is rotatably connected to the inner wall of the second limiting groove 154.

[0030] It is understandable that the locking tongue 153 can be restricted from rotating around the axis of the protective sleeve 2 by means of the locking connector 132, thereby restricting the locking sleeve 151 from rotating around the axis of the protective sleeve 2, thus restricting the rotation of the protective sleeve 2.

[0031] In practical application, the locking sleeve 151 is slid upward, and then the locking sleeve 151 drives the locking tongue 153 to slide upward along the first limiting groove 122 and disengage from the snap-fit ​​connector 132. After that, the protective sleeve 2 is rotated, and the protective sleeve 2 drives the locking sleeve 151 to rotate through the cooperation of the first limiting groove 122 and the locking tongue 153.

[0032] In this embodiment of the utility model, the protective sleeve 2 can rotate relative to the connecting component 13. By sliding the locking sleeve 151 upward, the locking sleeve 151 drives the locking tongue 153 to slide upward along the first limiting groove 122 and disengage from the snap-fit ​​connector 132. Then, by rotating the protective sleeve 2, the protective sleeve 2 drives the locking sleeve 151 to rotate through the cooperation of the first limiting groove 122 and the locking tongue 153. The protective sleeve 2 drives the first limiting groove 122 to rotate, and then the first limiting groove 122 drives the limiting rod 121 to rotate around the axis of the protective sleeve 2. Then, the limiting rod 121 drives the adjusting nut 10 to rotate and rise and fall along the spring rod 3, thereby adjusting the compression of the adjusting nut 10 on the adjusting spring 11, realizing the tightening or loosening of the adjusting spring 11, thereby changing the pressure of the adjusting spring 11 and realizing pressure difference adjustment. The snap-fit ​​connector 132 can restrict the rotation of the locking tongue 153 around the axis of the protective sleeve 2, thereby restricting the rotation of the protective sleeve 151 around the axis of the protective sleeve 2, thereby restricting the rotation of the protective sleeve 2 and locking the pressure difference.

[0033] The working principle of this utility model is as follows: the pressure at pressure inlet 9 is represented by P0, the pressure at inlet 7 by P1, the pressure at diaphragm cavity 14 by P2, and the pressure at outlet 8 by P3. When the system pressure difference P0-P3 changes, for example, if P0 increases, then the pressure entering valve body 1 increases. The pressure-sensing diaphragm 6 pulls the adjusting spring 11 downward through connecting rod 4, spring rod 3, and adjusting nut 10, causing the regulating valve core 5 to move downward, the valve opening to decrease, resulting in P1 also increasing. Ultimately, ΔP = P0 - P1 remains basically unchanged. For example, if P0 decreases, then the pressure entering valve body 1 decreases, the pressure on the pressure-sensing diaphragm 6 is insufficient, and the adjusting spring 11, through connecting rod 4, spring rod 3, and adjusting nut 10, pulls the adjusting spring 11 downward. This causes the adjusting valve core 5 to move downward, the valve opening to decrease, and P1 to also increase. Finally, ΔP = P0 - P1 remains basically unchanged. When the spring rod 3 and adjusting nut 10 pull the regulating valve core 5 upward, the valve opening increases, causing P1 to decrease, and ultimately ΔP = P0 - P1 remains essentially unchanged. When the flow rate before the valve decreases, P1 decreases, the pressure P2 entering below the pressure-sensing diaphragm 6 decreases, and P0 remains unchanged, causing the pressure-sensing diaphragm 6 to move downward, the regulating valve core 5 moves downward, the valve opening decreases, and the flow is cut off, causing P_valve_body 1 to increase, and ultimately ΔP = P0 - P_valve_body 1 remains unchanged. When the flow rate before the valve increases, P1 increases, the pressure P2 entering below the pressure-sensing diaphragm 6 increases, and P0 remains unchanged, causing the pressure-sensing diaphragm 6 to move upward, the regulating valve core 5 moves upward, the valve opening increases, and the flow is released, causing P1 to decrease, and ultimately the pressure difference ΔP = P0 - P1 remains unchanged.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dynamic differential pressure balancing valve, comprising a valve body (1), characterized in that, The valve body (1) has an inlet (7) on one side and an outlet (8) on the other side. A pressure inlet (9) is located on one side of the upper end of the valve body (1). A diaphragm cavity (14) is located inside the valve body (1), and a pressure-sensitive diaphragm (6) is located on the inner wall of the diaphragm cavity (14). A protective sleeve (2) is connected to the upper end of the valve body (1) via a connecting assembly (13). An adjusting nut (10) is located inside the protective sleeve (2), and a limit assembly (12) is provided between the adjusting nut (10) and the protective sleeve (2). The adjusting nut (10) is rotated and raised by the limiting component (12). The lower end of the outer wall of the protective sleeve (2) is fitted with a locking component (15). The inner wall of the adjusting nut (10) is threaded with a spring rod (3). The lower end of the spring rod (3) is fixedly connected with a connecting rod (4). The lower end of the connecting rod (4) passes through the pressure-sensitive diaphragm (6) and is fixedly connected with an adjusting valve core (5). An adjusting spring (11) is fitted between the adjusting nut (10) and the upper end of the valve body (1), and the adjusting spring (11) is fitted on the outer wall of the spring rod (3).

2. The dynamic differential pressure balancing valve according to claim 1, characterized in that, The connecting assembly (13) includes a snap-fit ​​slot (131) and a snap-fit ​​connector (132); The upper end of the valve body (1) is fixedly connected with multiple evenly distributed snap-fit ​​connectors (132), and the lower end of the protective sleeve (2) is fixedly provided with a snap-fit ​​groove (131), and the snap-fit ​​groove (131) is rotatably connected to the snap-fit ​​connector (132).

3. The dynamic differential pressure balancing valve according to claim 2, characterized in that, The limiting component (12) includes a limiting rod (121) and a first limiting groove (122); The outer wall of the protective sleeve (2) is provided with a plurality of evenly distributed first limiting grooves (122), and the outer wall of the adjusting nut (10) is fixedly connected with a plurality of evenly distributed limiting rods (121). The limiting rods (121) correspond one-to-one with the first limiting grooves (122), and the limiting rods (121) abut against the inner wall of the corresponding first limiting grooves (122).

4. The dynamic differential pressure balancing valve according to claim 3, characterized in that, The locking assembly (15) includes a locking sleeve (151), a limiting strip (152), a locking tongue (153), and a second limiting groove (154); The outer wall of the protective sleeve (2) is fixedly provided with a second limiting groove (154), and the outer wall of the protective sleeve (2) is slidably sleeved with a locking sleeve (151). The lower end of the inner wall of the locking sleeve (151) is fixedly connected with a locking tongue (153), and the locking tongue (153) is slidably connected with the inner wall of the first limiting groove (122). The upper end of the inner wall of the locking sleeve (151) is fixedly connected with a limiting strip (152). When the protective sleeve (2) rotates, the limiting strip (152) is rotatably connected with the inner wall of the second limiting groove (154).

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