Leakage-proof inflation and pressure relief device for expansion tank
By designing a double sealing assembly in the expansion tank, including a sealing core mechanism and a membrane sealing mechanism, the problem of insufficient sealing properties of the expansion tank is solved, and the effect of high sealing and low maintenance costs is achieved.
Patent Information
- Application Number
- CN202421771178.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-25
AI Technical Summary
The sealing properties of existing expansion tanks are insufficient, resulting in a drop in gas pressure, fluctuation in system pressure, causing system damage, and high maintenance costs.
An expansion tank leakage-proof inflation pressure relief device is designed, and a double sealing assembly is adopted, including a sealing core mechanism and a membrane sealing mechanism. Through the cooperation of the sealing core mechanism and the membrane sealing mechanism, a double seal is formed to improve the sealing property of the expansion tank.
The high sealing of the expansion tank is achieved, the maintenance cycle is extended, and the maintenance cost is reduced. As the pressure of gas or liquid in the expansion tank increases, the sealing effect of the diaphragm is better.
Smart Images
Figure CN222880437U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of expansion tank production and manufacturing, and in particular relates to a leakage-proof inflation and pressure relief device for an expansion tank. Background Art
[0002] The sealing of the expansion tank is an important indicator. Good sealing determines the realization of the expansion tank function and ensures that the system can maintain operation under the design parameters for a long time. The inflation joint is the key to determine the sealing of the expansion tank. The existing inflation joint is prone to poor sealing of the expansion tank, resulting in a drop in gas pressure, resulting in system pressure fluctuations and system damage. The existing inflation joint needs to be frequently checked for sealing and the seal of the inflation joint needs to be replaced, which has high maintenance costs and affects the normal use of the system.
[0003] Therefore, the above problems need to be solved urgently. Utility Model Content
[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides an expansion tank leak-proof inflation and pressure relief device, which establishes a double seal, improves the sealing of the expansion tank, extends the maintenance cycle, and reduces the maintenance cost.
[0005] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides an anti-leakage inflation and pressure relief device for an expansion tank, including a mounting seat, which is a hollow cylinder, and the mounting seat is provided with an air inlet, and a double sealing component is provided along the air inlet, and the double sealing component includes a sealing core mechanism and a membrane sealing mechanism. The air inlet includes a sealing core installation cavity and a membrane sealing installation cavity, the sealing core mechanism is installed in the sealing core installation cavity, and the membrane sealing mechanism is installed in the membrane sealing installation cavity. During inflation, the inflation head is connected to the mounting seat, the sealing core mechanism is squeezed open by the gas rushed into the inflation head, and the membrane sealing mechanism is squeezed open by the sealing core mechanism to form a one-way channel, and the inflation head is inflated from the air inlet. After inflation, the inflation head is separated from the mounting seat, the sealing core mechanism and the membrane sealing mechanism are reset, and the sealing core mechanism and the membrane sealing mechanism seal the air inlet. The sealing core mechanism and the membrane sealing mechanism form a double seal, which improves the sealing performance of the expansion tank, extends the maintenance cycle, and reduces the maintenance cost.
[0006] Furthermore, in the above-mentioned anti-leakage inflation and pressure relief device for the expansion tank, the membrane sealing mechanism includes a diaphragm and a spring, and a retaining spring is provided at one end of the membrane sealing installation cavity away from the sealing core installation cavity. The sealing core installation cavity and the membrane sealing installation cavity form a step. One end of the spring abuts against the retaining spring, and the diaphragm is placed on the side of the step close to the retaining spring, and the spring squeezes the diaphragm. The diaphragm is subjected to the thrust of the spring and the pressure of the gas or liquid in the expansion tank, so that the diaphragm is tightly pressed against the step to form a stable sealing state, and as the pressure of the gas or liquid in the expansion tank increases, the diaphragm receives greater pressure and the sealing effect is better.
[0007] Furthermore, in the above-mentioned anti-leakage inflation and pressure relief device for the expansion tank, the diaphragm includes a ring film and a column. The ring film is integrally arranged around the column, and the spring squeezes the ring film against the step to form a seal. One end of the column is arranged in the hollow part of the spring, and the end of the column away from the spring is arranged close to the sealing core mechanism. The ring film is close to the step to form a seal. When the pressure is released, the sealing core mechanism is pushed to open the sealing core mechanism to form a channel, and the column is subjected to the thrust of the sealing core mechanism, and the column moves, driving the ring film and the step to separate, so as to release the pressure.
[0008] Furthermore, in the above-mentioned expansion tank anti-leakage inflation pressure relief device, the column is divided into an upper part and a lower part. The upper part is arranged in the sealing core installation cavity. The lower part is arranged in the membrane sealing installation cavity, and the diameter of the lower part is larger than the inner diameter of the sealing core installation cavity. When the pressure is released, the upper part contacts the sealing core mechanism. When sealing, the lower part bears the pressure in the expansion tank, and the diameter of the lower part is larger than the inner diameter of the sealing core installation cavity, so that the force of the lower part is applied to the step, thereby improving the mechanical strength and the durability of the diaphragm.
[0009] Furthermore, in the above-mentioned expansion tank anti-leakage inflation and pressure relief device, the spring is a conical spring. The conical spring can provide more compression space and improve air circulation efficiency.
[0010] Furthermore, in the above-mentioned anti-leakage inflation and pressure relief device for the expansion tank, in order to improve the sealing performance of the mounting seat and the expansion tank body, a shoulder is provided on the outer wall of the mounting seat, a sealing ring is provided on the top surface of the shoulder, the sealing ring is arranged in the groove of the shoulder, a locking nut is provided on the outer wall of the mounting seat, the locking nut is arranged on the upper side of the shoulder, and the locking nut is threadedly connected to the mounting seat. During installation, the shoulder and the locking nut work together to fix the mounting seat to the expansion tank, and the sealing ring of the shoulder is squeezed and pressed against the inner wall of the expansion tank to form a seal.
[0011] Furthermore, in the above-mentioned expansion tank leak-proof inflation and pressure relief device, a gasket is provided between the locking nut and the shoulder. During installation, the gasket is placed outside the expansion tank, between the locking nut and the tank body of the expansion tank, to prevent the locking nut from damaging the tank body.
[0012] Furthermore, in the above-mentioned expansion tank anti-leakage inflation and pressure relief device, the sealing core mechanism is a valve core, and the sealing core mechanism and the sealing core mounting cavity are threadedly sealed. When inflating, compressed air can enter the expansion tank from the valve core. When not inflated, the compressed air in the expansion tank cannot escape through the valve core.
[0013] It can be seen from the above technical scheme that the utility model has the following beneficial effects: the utility model has a double seal formed by the sealing core mechanism and the membrane sealing mechanism of the leakage-proof inflation and pressure relief device for the expansion tank, thereby improving the sealing performance of the expansion tank, extending the maintenance cycle, and reducing the maintenance cost. The diaphragm is subjected to the thrust of the spring and the pressure of the gas or liquid in the expansion tank at the same time, forming a stable sealing state, and as the pressure of the gas or liquid in the expansion tank increases, the sealing effect of the diaphragm is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the installation of the leak-proof inflation and pressure relief device for the expansion tank of the utility model;
[0015] Figure 2 A front view of the utility model anti-leakage inflation pressure relief device for an expansion tank;
[0016] Figure 3 for Figure 2 A sectional view shown;
[0017] Figure 4 for Figure 3 Partial enlargement.
[0018] In the figure: 1, mounting seat, 11, air inlet, 111, sealing core mounting cavity, 112, membrane sealing mounting cavity, 113, step, 12, shoulder, 13, sealing ring, 14, locking nut, 15, gasket, 2, sealing core mechanism, 3, membrane sealing mechanism, 31, diaphragm, 311, ring membrane, 312, column, 3121, upper part, 3122, lower part, 32, spring, 33, retaining spring. DETAILED DESCRIPTION
[0019] Example 1
[0020] like Figure 1-3The illustrated expansion tank leak-proof inflation and pressure relief device comprises a mounting seat 1, which is a hollow cylinder. The mounting seat 1 is provided with an air inlet 11, and a double sealing assembly is provided along the air inlet. The double sealing assembly comprises a sealing core mechanism 2 and a membrane sealing mechanism 3. The air inlet 11 comprises a sealing core installation cavity 111 and a membrane sealing installation cavity 112. The sealing core mechanism 2 is installed in the sealing core installation cavity 111, and the membrane sealing mechanism 3 is installed in the membrane sealing installation cavity 112. When inflating, the inflation head is connected to the mounting seat 1, the sealing core mechanism 2 is squeezed open by the inflation head, the membrane sealing mechanism 3 is squeezed open by the sealing core mechanism 2, and the inflation head is inflated from the air inlet 11. The inflation head is separated from the mounting seat 1, the sealing core mechanism 2 and the membrane sealing mechanism 3 are reset, and the sealing core mechanism 2 and the membrane sealing mechanism 3 seal the air inlet 11. The membrane sealing mechanism 3 comprises a diaphragm 31 and a spring 32, and a retaining spring 33 is clamped at one end of the membrane sealing installation cavity 112 away from the sealing core installation cavity 111. The material of the diaphragm 31 is preferably aging-resistant rubber. The sealing core mounting cavity 111 and the membrane sealing mounting cavity 112 form a step 113. One end of the spring 32 abuts against the retaining spring 33, and the diaphragm 31 is placed on the step 113 close to the retaining spring 33, and the spring 32 squeezes the diaphragm 31. The spring 32 is a conical spring. In order to improve the sealing performance of the mounting seat 1 and the expansion tank body, the outer wall of the mounting seat 1 is provided with a shoulder 12, the top surface of the shoulder 12 is provided with a sealing ring 13, the outer wall of the mounting seat 1 is provided with a locking nut 14, the locking nut 14 is provided on the upper side of the shoulder 12, and the locking nut 14 is threadedly connected to the mounting seat 1. A gasket 15 is provided between the locking nut 14 and the shoulder 12. The sealing core mechanism 2 is a valve core, and the sealing core mechanism 2 and the sealing core mounting cavity 111 are threadedly sealed.
[0021] During installation, insert the mounting seat 1 into the hole reserved in the expansion tank body, place the shoulder 12 inside the expansion tank body, tighten the locking nut 14, and the sealing ring 13 and the inner wall of the expansion tank body form a seal. During inflation, connect the inflation head and the mounting seat 1, and the air rushed into the inflation head squeezes the valve needle of the sealing core mechanism 2, pushing the valve needle away, and the valve needle squeezes the diaphragm 31, separating the diaphragm 31 and the step 113 to form a one-way air intake channel, and inflate the expansion tank from the air intake 11. After inflation, separate the inflation head and the mounting seat 1, the sealing core mechanism 2 is reset, and the diaphragm 31 is pressed against the step 113 by the thrust of the spring 32 and the internal gas pressure of the expansion tank, closing the air intake 11, and the sealing core mechanism 2 and the membrane sealing mechanism 3 form a double seal.
[0022] like Figure 4The illustrated anti-leakage inflation pressure relief device for the expansion tank includes a diaphragm 311 and a column 312. The diaphragm 311 is integrally arranged around the column 312, and the spring 32 presses the diaphragm 311 against the step 113. One end of the column 312 is arranged in the hollow part of the spring 32, and the end of the column 312 away from the spring 32 is arranged close to the sealing core mechanism 2. The diaphragm 311 is close to the step 113 to play a sealing role. When the pressure is released, the sealing core mechanism 2 is pushed to open the sealing core mechanism 2, and the column 312 is subjected to the thrust of the sealing core mechanism 2, and the column 312 moves, and the column 312 drives the diaphragm 311 and the step 113 to separate, and the pressure is released. The column 312 is divided into an upper part 3121 and a lower part 3122. The upper part 3121 is arranged in the sealing core installation cavity 111. The lower part 3122 is arranged in the membrane seal installation cavity 112, and the diameter of the lower part 3122 is larger than the inner diameter of the seal core installation cavity 111. When the pressure is released, the upper part 3121 contacts the seal core mechanism 2. When sealing, the lower part 3122 bears the pressure in the expansion tank, and the diameter of the lower part 3122 is larger than the inner diameter of the seal core installation cavity 111, so that the force of the lower part 3122 is applied to the step 113.
[0023] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with this field can understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. An expansion tank leak-proof inflation and pressure relief device, characterized in that: The invention comprises a mounting seat (1), wherein the mounting seat (1) is a hollow cylinder, the mounting seat (1) is provided with an air inlet (11), a double sealing assembly is provided along the air inlet, the double sealing assembly comprises a sealing core mechanism (2) and a membrane sealing mechanism (3); the air inlet (11) comprises a sealing core installation cavity (111) and a membrane sealing installation cavity (112), the sealing core mechanism (2) is installed in the sealing core installation cavity (111), and the membrane sealing mechanism (3) is installed in the membrane sealing installation cavity (112); when inflating, an inflation head is connected to the mounting seat (1), the sealing core mechanism (2) is squeezed open by the inflation head, the membrane sealing mechanism (3) is squeezed open by the sealing core mechanism (2), and the inflation head is inflated from the air inlet (11); the inflation head is separated from the mounting seat (1), the sealing core mechanism (2) and the membrane sealing mechanism (3) are reset, and the sealing core mechanism (2) and the membrane sealing mechanism (3) seal the air inlet (11).
2. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 1, characterized in that: The membrane sealing mechanism (3) comprises a membrane (31) and a spring (32); a retaining spring (33) is provided at one end of the membrane sealing installation cavity (112) away from the sealing core installation cavity (111); the sealing core installation cavity (111) and the membrane sealing installation cavity (112) form a step (113); one end of the spring (32) abuts against the retaining spring (33), the membrane (31) is placed on the side of the step (113) close to the retaining spring (33), and the spring (32) squeezes the membrane (31).
3. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 2, characterized in that: The diaphragm (31) comprises a ring diaphragm (311) and a column (312); the ring diaphragm (311) is integrally arranged around the column (312), and the spring (32) presses the ring diaphragm (311) against the step (113) to form a seal; one end of the column (312) is arranged in a hollow portion of the spring (32), and one end of the column (312) away from the spring (32) is arranged close to the sealing core mechanism (2).
4. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 3, characterized in that: The column (312) is divided into an upper part (3121) and a lower part (3122); the upper part (3121) is arranged in the sealing core installation cavity (111); the lower part (3122) is arranged in the membrane sealing installation cavity (112), and the diameter of the lower part (3122) is greater than the inner diameter of the sealing core installation cavity (111).
5. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 2, characterized in that: The spring (32) is a conical spring.
6. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 1, characterized in that: The outer wall of the mounting seat (1) is provided with a shoulder (12), the top surface of the shoulder (12) is provided with a sealing ring (13), the outer wall of the mounting seat (1) is provided with a locking nut (14), the locking nut (14) is arranged on the upper side of the shoulder (12), and the locking nut (14) and the mounting seat (1) are threadedly connected.
7. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 6, characterized in that: A gasket (15) is provided between the locking nut (14) and the shoulder (12).
8. The anti-leakage inflation and pressure relief device for an expansion tank according to claim 1, characterized in that: The sealing core mechanism (2) is a valve core, and the sealing core mechanism (2) and the sealing core installation cavity (111) are threadedly sealed.