Improved diaphragm air pressure tank

Abstract

The utility model discloses an improved diaphragm air pressure tank which comprises a tank body, a water body is contained in the tank body, a water inlet and outlet used for communicating an inner cavity of the tank body with an external system is formed in the bottom of the tank body, an air bag is arranged in the tank body, the upper end of the air bag is connected with the top of the tank body, and the air bag is sealed and used for storing compressed air. Water of an external system is introduced into the tank body through the water inlet and the water outlet, so that the water pressure in the tank body is increased, the air bag is compressed, the gas density in the air bag is increased, and the air pressure is increased; on the contrary, when the pressure of the external system is reduced, the pressure in the air bag is reduced, the volume is expanded, and the water in the tank body is supplemented to the external system under the pressure action of the air bag; the air bag is filled with air, and the mass of the air bag is far lower than that of water, so that the air bag floats on the water all the time, friction between the air bag and the inner wall of the tank body is completely avoided, and tearing of the air bag is prevented.

Description

Technical Field

[0001] The utility model relates to an improved diaphragm air pressure tank, belonging to the technical field of air pressure tank equipment. Background Art

[0002] The traditional diaphragm air pressure tank is the most commonly used product in water supply equipment. It generally includes a tank body and a capsule. The capsule is set in the tank body. The capsule is used to load water, and the tank body is used to load compressed air. That is, the actual shape of the capsule in the diaphragm air pressure tank is a schematic diagram of the structure. Figure 6 , Figure 7 The shape of a water drop in the tank. As the pressure in the system changes, the capsule storing water is inevitably expanded and shrunk by the pressurized water, and keeps changing. Under the action of water gravity, the capsule diaphragm is basically completely fitted together at the bottom, lower part and inner wall of the pressure tank. The change of water pressure in the system causes the capsule to deform (expand and shrink) inside the tank under the action of water pressure and air pressure in the tank, and the capsule will also move relative to the inner wall of the tank. This leads to one of the biggest drawbacks of traditional diaphragm pressure tanks. Under the action of pressure, the capsule is torn and scratched by the welds of the tank body, weld scars, etc. The rupture of the pressure tank capsule has become the most common phenomenon of traditional diaphragm pressure tanks. In view of this, an improved diaphragm pressure tank is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide an improved diaphragm air pressure tank to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an improved diaphragm air pressure tank, comprising:

[0005] The tank body has legs at the bottom thereof, which are used to support the tank body. The tank body is filled with water. The bottom of the tank body has water inlets and outlets for connecting the inner cavity of the tank body with an external system, which may be a water supply, fire protection or air conditioning system;

[0006] An air bag is arranged inside the tank body, the upper end of the air bag is connected to the top of the tank body, and the air bag is sealed for storing compressed air;

[0007] Among them, the water pressure in the tank is regulated by an external system.

[0008] Preferably, the tank comprises:

[0009] The can body is a cylindrical structure, and a shoulder is provided at the upper end of the can body;

[0010] The upper cover is fixedly connected to the upper end of the can body through a ring shoulder, and the air bag is connected to the upper cover.

[0011] Preferably, a socket is provided on the upper cover, a connecting column is inserted into the socket, the lower end of the connecting column extends into the air bag and is fixed with a pressure plate, and a locking nut is engaged with the connecting column by means of an external thread.

[0012] Preferably, an inflation hole is provided on the connecting column, the inner end of the inflation hole is communicated with the inner cavity of the air bag, and the inside of the inflation hole is slidably connected to an inflation valve for one-way sealing the inflation hole via a spring.

[0013] Preferably, the upper end of the connecting column is engaged with a cap through an external thread, and a sealing plug for inserting into the inflation hole is fixed on the cap.

[0014] Preferably, a pressure gauge port for connecting a pressure gauge is provided on the upper cover.

[0015] Preferably, the water inlet and outlet are fixedly connected with connecting water pipes for connecting to an external system.

[0016] Preferably, the inner wall of the tank body is coated with an anti-rust coating or the tank body is made of stainless steel.

[0017] Compared with existing technologies:

[0018] The utility model introduces water from an external system into the tank body through the water inlet and outlet, causing the water pressure in the tank body to increase, and the air bag to be compressed, resulting in an increase in the gas density in the air bag and an increase in the air pressure; conversely, when the pressure of the external system decreases, the pressure inside the air bag decreases and the volume expands, and the water in the tank body replenishes water to the external system under the action of the pressure of the air bag; and the air bag contains gas, the mass of which is much lower than that of water, so the air bag always floats on the water, completely avoiding the friction between the air bag and the inner wall of the tank body, and preventing the air bag from tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a cross-sectional view of the can body, upper cover and air bag of the utility model;

[0021] Figure 3 It is a cross-sectional exploded view of the upper cover, air bag, inflation hole and locking nut of the utility model;

[0022] Figure 4 It is a cross-sectional view of the upper cover, air bag, connecting column and pressure plate of the utility model;

[0023] Figure 5 It is a cross-sectional view of the connection column, the inflation hole, the cap plate and the sealing plug of the utility model;

[0024] Figure 6 The prior art of the utility model is shown in FIG. Figure 1;

[0025] Figure 7 The prior art of the utility model is shown in FIG. Figure 2 .

[0026] In the figure: 1, tank body, 101, water inlet and outlet, 102, tank body, 103, upper cover, 104, jack, 2, air bag, 3, pressure gauge port, 4, connecting water pipe, 5, supporting leg, 6, connecting column, 601, inflation hole, 7, pressure plate, 8, locking nut, 9, spring, 10, inflation valve, 11, cover cap, 12, sealing plug. DETAILED DESCRIPTION

[0027] The present invention is described below with specific embodiments, but is not intended to be a limitation of the present invention.

[0028] Embodiment 1

[0029] like Figure 1-Figure 5 As shown, in this embodiment, an improved diaphragm air pressure tank is provided, including a tank body 1, the bottom of the tank body 1 is provided with legs 5, the number of the legs 5 is three or more, the legs 5 play a role in supporting the tank body 1, the tank body 1 is filled with water, the bottom of the tank body 1 is provided with a water inlet and outlet 101 for connecting the inner cavity of the tank body 1 with an external system, and the external system can be a water supply, fire protection or air conditioning system; the tank body 1 is provided with an air bag 2, the upper end of the air bag 2 is connected to the top of the tank body 1, and the air bag 2 is sealed for storing compressed air;

[0030] Wherein, the water pressure in the tank 1 is regulated by an external system;

[0031] The air bag 2 is pre-filled with pressurized air (which may also be nitrogen) to a certain pressure, and then the inner cavity of the tank body 1 is connected to the external system through the water inlet and outlet 101;

[0032] When the pressure of the external system increases, the water in the external system enters the tank body 1 from the water inlet and outlet 101, causing the water pressure in the tank body 1 to increase, and the air bag 2 to be compressed, resulting in an increase in the gas density in the air bag 2 and an increase in the air pressure; conversely, when the pressure of the external system decreases, the pressure inside the air bag 2 decreases and the volume expands, and the water in the tank body 1 replenishes the external system under the pressure of the air bag 2, and so on.

[0033] like Figure 1 , Figure 2 As shown, the tank body 1 includes a tank body 102 and an upper cover 103. The tank body 102 is a cylindrical structure, and a shoulder is provided at the upper end of the tank body 102. The upper cover 103 is fixedly connected to the upper end of the tank body 102 through the shoulder, and the air bag 2 is connected to the upper cover 103. The water inlet and outlet 101 are opened at the bottom of the tank body 1.

[0034] like Figure 1 , Figure 2 As shown, in order to be able to detect the pressure in the tank body 1 in real time, a pressure gauge port 3 for connecting a pressure gauge is opened on the upper cover 103. The pressure gauge port 3 serves as a connection interface to enable the pressure gauge to be quickly installed on the upper cover 103. The pressure gauge can detect the changes in the pressure in the tank body 1 in real time and provide accurate pressure data for the operator.

[0035] like Figure 1 As shown, in order to connect the water inlet and outlet 101 to an external system, a connecting water pipe 4 for connecting to an external system is fixedly connected to the water inlet and outlet 101 .

[0036] In order to prevent rust caused by direct contact between water and the tank body 1, the inner wall of the tank body 1 is coated with a layer of rust-proof coating or the tank body 1 is made of stainless steel.

[0037] Embodiment 2

[0038] like Figure 3 , Figure 4 As shown, on the basis of the first embodiment, in order to fix the air bag 2 on the upper cover 103, the upper cover 103 is provided with a plug hole 104, the inside of the plug hole 104 is plugged with a connecting column 6, the lower end of the connecting column 6 extends into the air bag 2 and is fixed with a pressure plate 7, and the connecting column 6 is engaged with a locking nut 8 by means of an external thread;

[0039] A hole is provided at the top of the air bag 2. In a natural state, the diameter of the hole is smaller than the diameter of the pressure plate 7. The air bag 2 is made of rubber and is elastic. After the hole at the top of the air bag 2 is stretched open, the pressure plate 7 can enter the interior of the air bag 2 through the hole. When the air bag 2 is fixed, first insert one end of the connecting column 6 connected to the pressure plate 7 into the interior of the air bag 2. At this time, after the end of the connecting column 6 away from the pressure plate 7 is passed through the jack 104, the locking nut 8 is used to screw on the connecting column 6. As the locking nut 8 is tightened, the pressure plate 7 will press the surrounding side walls of the hole at the top of the air bag 2 onto the side walls of the upper cover 103. While fixing the air bag 2 on the upper cover 103, the air bag 2 will also be sealed, thereby improving the installation efficiency.

[0040] In addition, if Figure 3 , Figure 4 As shown, in order to increase the sealing performance of the air bag 2, the surfaces of the pressure plate 7 and the upper cover 103 that are crimped against the side walls of the air bag 2 are provided with annular protrusions. When the pressure plate 7 crimps the surrounding side walls of the top hole of the air bag 2 against the side walls of the upper cover 103, the annular protrusions compress the side walls of the air bag 2 to deform, thereby further improving the sealing performance.

[0041] Embodiment 3

[0042] like Figure 4 , Figure 5As shown, on the basis of the second embodiment, in order to be able to fill gas into the interior of the air bag 2, an inflation hole 601 is opened on the connecting column 6 in this embodiment, the inner end of the inflation hole 601 is connected to the inner cavity of the air bag 2, and the interior of the inflation hole 601 is slidably connected with an inflation valve 10 for one-way sealing the inflation hole 601 through a spring 9, and the upper end of the connecting column 6 is designed to be docked with the inflation port of the external inflation device. When the inflation port of the external inflation device is docked with the upper end of the connecting column 6, the inflation port is connected with the inflation hole 601. When the external inflation device is started, the inflation port inflates the inflation hole 601. At this time, the inflation valve 10 compresses the spring 9 to slide, and the gas will enter the air bag 2 from the inflation hole 601 to realize the inflation of the air bag 2. When the external inflation device stops, the spring 9 presses the inflation valve 10 to reset, causing the inflation hole 601 to be blocked, thereby realizing the sealing of the gas inside the air bag 2.

[0043] like Figure 5 As shown, in order to further seal the inflation hole 601, the upper end of the connecting column 6 is engaged with a cap 11 through an external thread, and a sealing plug 12 for inserting into the inflation hole 601 is fixed on the cap 11. After the air bag 2 is filled with gas, the inflation port of the external inflation device is removed from the connecting column 6, and then the cap 11 is screwed on the upper end of the connecting column 6. At this time, the sealing plug 12 is inserted into the inflation hole 601, and the inflation hole 601 is secondary sealed by the sealing plug 12, so that the inflation hole 601 is further sealed, thereby improving the sealing performance of the air bag 2;

[0044] like Figure 5 As shown, after the locking nut 8 is tightened, a portion of the external thread on the connecting column 6 is exposed, and the cap 11 is tightened on the external thread of the exposed portion, thereby reducing the difficulty of threading the connecting column 6.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An improved diaphragm pressure tank, characterized in that: include: A tank body (1), wherein water is contained in the tank body (1), and a water inlet and outlet (101) is provided at the bottom of the tank body (1) for connecting the inner cavity of the tank body (1) with an external system; An air bag (2), the air bag (2) being arranged inside the tank body (1), the upper end of the air bag (2) being connected to the top of the tank body (1), and the air bag (2) being sealed and used for storing compressed air; The water pressure in the tank (1) is regulated by an external system.

2. An improved diaphragm air pressure tank according to claim 1, characterized in that: The tank body (1) comprises: A can body (102), wherein the can body (102) is a cylindrical structure, and a shoulder is provided at the upper end of the can body (102); An upper cover (103) is fixedly connected to the upper end of the can body (102) via a shoulder ring, and the air bag (2) is connected to the upper cover (103).

3. An improved diaphragm air pressure tank according to claim 2, characterized in that: The upper cover (103) is provided with a plug hole (104), a connecting column (6) is inserted into the plug hole (104), the lower end of the connecting column (6) extends into the air bag (2) and is fixed with a pressure plate (7), and a locking nut (8) is engaged with the connecting column (6) by means of an external thread.

4. An improved diaphragm air pressure tank according to claim 3, characterized in that: The connecting column (6) is provided with an inflation hole (601), the inner end of the inflation hole (601) is connected to the inner cavity of the air bag (2), and the interior of the inflation hole (601) is slidably connected to an inflation valve (10) for one-way sealing the inflation hole (601) via a spring (9).

5. An improved diaphragm air pressure tank according to claim 4, characterized in that: The upper end of the connecting column (6) is engaged with a cover cap (11) via an external thread, and a sealing plug (12) for inserting into the inflation hole (601) is fixed on the cover cap (11).

6. An improved diaphragm air pressure tank according to claim 2, characterized in that: The upper cover (103) is provided with a pressure gauge port (3) for connecting a pressure gauge.

7. An improved diaphragm air pressure tank according to claim 1, characterized in that: The water inlet and outlet (101) are fixedly connected to a connecting water pipe (4) for connecting to an external system.

8. An improved diaphragm air pressure tank according to claim 1, characterized in that: The inner wall of the tank body (1) is coated with a layer of rust-proof coating or the tank body (1) is made of stainless steel.

Images