Improved pressure tank inlet assembly

Abstract

The utility model provides a kind of improved structure's pressure tank air intake assembly, belong to mechanical technical field.It has solved the problem of existing air intake assembly increase procurement difficulty.In the utility model, pressure tank includes jar body and be located in the bladder of jar body, and the air cavity between the bladder outer wall and jar body inner wall is formed, and the air inlet of communicating air cavity is penetrated in jar body top portion, and air intake assembly includes the air nozzle of being located in jar body outside, and air nozzle includes tubular gas outlet end, and gas outlet end lower end is inserted into air cavity by air inlet, and the outer thread of gas outlet end lower end outer wall is equipped, and the connecting sleeve is connected with the outer thread of gas outlet end lower end, and the annular limiting member is formed on the upper end outer wall of gas outlet end, and jar body top wall inside and outside are respectively pressed on the top wall of connecting sleeve and the bottom wall of limiting member and form seal;Rubber pad is fixed on the bottom wall of connecting sleeve, and rubber pad is annular, and rubber pad is below gas outlet end, and the projection of rubber pad upwards completely covers connecting sleeve.The utility model can reduce procurement difficulty.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a pressure tank, particularly a pressure tank air inlet assembly with an improved structure. Background Technology

[0002] Pressure tanks are used in closed-loop water circulation systems to balance water volume and pressure, preventing frequent opening of safety valves and frequent replenishment of water by automatic water replenishment valves.

[0003] The existing pressure tank structure is as described in the applicant's previously proposed air inlet assembly (authorization announcement number: CN209839680 U). The pressure tank includes a tank body and an air bladder disposed within the tank body, with a closed air cavity formed between the outer wall of the air bladder and the inner wall of the tank body. An air inlet communicating with the air cavity is provided through the side wall of the tank body. This air inlet assembly includes an air nozzle disposed outside the tank body, the air nozzle including a tubular air outlet end, the inner end of which passes through the air inlet end and is located within the air cavity. The characteristic feature is that an annular flange is integrally formed on the outer wall of the inner end of the air outlet end. A buffer ring made of rubber material is provided within the air cavity, and the annular flange and the air outlet end... The buffer ring, air bladder, and air bladder are arranged coaxially. The inner wall of the air bladder has an annular groove, which consists of two opposite groove walls and a bottom wall between the two groove walls. The annular flange is located in the annular groove, and the two ends of the annular flange are tightly abutted against the two groove walls. One end of the air bladder is pressed tightly against the inner wall of the tank to form a seal, and the other end of the air bladder is located between the air bladder and the annular flange. The outer end of the air outlet is fitted with a pressure ring and a pressure cap screwed on to press the pressure ring tightly against the outer wall of the tank.

[0004] In the aforementioned air intake assembly, the air outlet is connected to the tank body through the cooperation of an annular flange, a buffer ring, and a pressure cap. However, there are very few air nozzles on the market that have both an annular flange and external threads at the air outlet. This means that the air nozzle style involved in this patent needs to be customized, which increases the difficulty and cost of procurement. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an improved pressure tank air inlet assembly that reduces procurement difficulties.

[0006] The objective of this utility model can be achieved through the following technical solution: an improved pressure tank air inlet assembly, the pressure tank including a tank body and a bladder disposed within the tank body, with a closed air cavity formed between the outer wall of the bladder and the inner wall of the tank body, and an air inlet penetrating through the top of the tank body to communicate with the air cavity, the air inlet assembly including an air nozzle disposed outside the tank body, the air nozzle including a tubular air outlet end, the lower end of the air outlet end extending into the air cavity through the air inlet end, and the lower end of the air outlet end having an external thread on its outer wall, characterized in that the lower end of the air outlet end is externally threaded to a connecting sleeve, the upper end of the air outlet end has an annular limiting member on its outer wall, and the inner and outer sides of the top wall of the tank body are respectively pressed against the top wall of the connecting sleeve and the bottom wall of the limiting member to form a seal; a rubber pad is fixed on the bottom wall of the connecting sleeve, the rubber pad is annular and coaxial with the air outlet end, the rubber pad is below the air outlet end, and the upward projection of the rubber pad completely covers the connecting sleeve.

[0007] The rubber pad is placed below the air outlet, and its upward projection completely covers the connecting sleeve. In actual use, the rubber pad replaces the connecting sleeve in contact with the bladder that expands due to water ingress. Because the rubber pad is soft and has good elasticity, this effectively prevents the bladder from rupturing, thereby extending the life of the pressure tank.

[0008] During assembly, simply insert the lower end of the outlet into the air chamber through the inlet, then screw in the connecting sleeve to make it contact and limit the contact with the top wall of the tank. This completes the assembly of the nozzle and the tank. This assembly method is not only compatible with most external threaded nozzles on the market, but also has strong versatility, which greatly reduces the difficulty and cost of procurement. Moreover, the entire assembly process has fewer steps and has the advantages of being convenient and easy to assemble.

[0009] In the aforementioned improved pressure tank inlet assembly, the connecting sleeve consists of a coaxially arranged cylindrical section and a tubular section. The tubular section is formed on the top wall of the cylindrical section and is threadedly connected to the outlet end. The shape and size of the rubber gasket match the inner hole of the cylindrical section. The rubber gasket is embedded inside the cylindrical section, with its lower side extending out of the cylindrical section. A coaxial annular retaining edge is formed on the lower outer wall of the rubber gasket, pressing against and covering the bottom wall of the cylindrical section. This design increases the contact area between the rubber gasket and the connecting sleeve, improving the positioning stability and strength of the rubber gasket, and allowing it to better contact the bladder.

[0010] In the improved pressure tank inlet assembly described above, the axial cross-section of the cylinder wall is approximately inverted L-shaped, and the cylinder consists of an upper ring section and a lower ring section. The aforementioned tube is located on the upper ring section, with the inner diameter of the upper ring section being smaller than the inner diameter of the tube, and the inner diameter of the lower ring section being larger than the outer diameter of the tube. This design increases the size of the rubber gasket by enlarging the inner diameter of the cylinder, allowing for a more flat contact with the bladder and better protection of the bladder.

[0011] In the improved pressure tank air inlet assembly described above, the top wall of the rubber pad extends upward and is integrally formed with an annular sealing part. The sealing part passes through the inner hole of the upper annular section and presses against the bottom wall of the air outlet end to extend the sealing path formed between the connecting sleeve and the air outlet end, prevent air leakage, and ensure stable operation of the pressure tank.

[0012] In the improved pressure tank air inlet assembly described above, the inner holes of the sealing part and the rubber gasket together form a conical hole. The diameter of the conical hole gradually increases from top to bottom, and the minimum diameter of the conical hole is larger than the inner diameter of the air outlet end, so that the lower port of the air outlet end is unobstructed, ensuring that the gas is smoothly and quickly discharged into the air chamber.

[0013] In the improved pressure tank air intake assembly described above, an annular groove coaxial with the pipe is provided on the top wall of the pipe. A rubber ring is provided in the annular groove, and the two ends of the rubber ring are pressed against the top wall of the tank and the bottom wall of the annular groove, respectively, to increase the sealing performance between the connecting sleeve and the top wall of the tank.

[0014] In the improved pressure tank air intake assembly described above, the inner wall of the lower ring section is a conical surface one with a diameter that increases from top to bottom, and the outer wall of the rubber pad has a conical surface two that matches the conical surface one. The conical surface one and the conical surface two are in close contact to improve the installation accuracy of the rubber pad.

[0015] In the aforementioned improved pressure tank inlet assembly, the limiting component is an integrally formed limiting seat on the upper outer wall of the outlet end, and the limiting seat is annular and coaxial with the outlet end. Air nozzles with limiting seats are also quite common in the market, further reducing procurement difficulties.

[0016] As another option, in the pressure tank inlet assembly of the above-mentioned improved structure, the external thread extends to the upper outer wall of the outlet end, and the limiting components are an annular gasket fitted on the upper end of the outlet end and a pressure cap threadedly connected to the upper end of the outlet end, with the top and bottom surfaces of the annular gasket pressed tightly against the pressure cap and the tank body, respectively.

[0017] Compared with existing technologies, the improved pressure tank inlet assembly has the following advantages:

[0018] 1. During assembly, simply insert the lower end of the outlet into the air chamber through the inlet, then screw in the connecting sleeve to make it contact and limit the contact with the top wall of the tank. This completes the assembly of the nozzle and the tank. This assembly method is not only compatible with most nozzles with external threads on the market, but also has strong versatility, which greatly reduces the difficulty and cost of procurement. Moreover, the entire assembly process has fewer steps and has the advantages of being convenient and easy to assemble.

[0019] 2. The top wall of the rubber gasket extends upwards and is integrally formed with an annular sealing part. The sealing part passes through the inner hole of the upper ring section and presses against the bottom wall of the air outlet end to extend the sealing path formed between the connecting sleeve and the air outlet end, prevent air leakage, and ensure the stable operation of the pressure tank. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of a pressure tank.

[0021] Figure 2 yes Figure 1 Enlarged diagram of point A in the middle.

[0022] Figure 3 This is a structural diagram of the connecting sleeve.

[0023] In the diagram, 1. Tank body; 2. Leather bladder; 3. Air chamber; 4. Tank lid; 5. Air nozzle; 5a. Air outlet; 5b. Limiting component; 6. Connecting sleeve; 6a. Cylindrical section; 6a1. Upper ring section; 6a2. Lower ring section; 6a3. Conical surface one; 6b. Tube section; 7. Rubber pad; 7a. Annular flange; 7b. Sealing part; 7c. Conical hole; 8. Rubber ring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1: As Figure 1 As shown, in the improved pressure tank air inlet assembly, the pressure tank includes a tank body 1 and a bladder 2 disposed within the tank body 1. A closed air chamber 3 is formed between the outer wall of the bladder 2 and the inner wall of the tank body 1. An air inlet communicating with the air chamber 3 is vertically inserted through the top of the tank body 1. In the actual product, a tank cover 4 is horizontally provided at the bottom of the tank body 1. The tank cover 4 is fixed to the tank body 1 by a ring of bolts. The opening edge of the bladder 2 is clamped between the tank cover 4 and the tank body 1, thus both positioning the bladder 2 and sealing the connection between the tank body 1 and the tank cover 4.

[0026] like Figure 1 and Figure 2 As shown, this air intake assembly includes an air nozzle 5 located outside the tank body 1. The air nozzle 5 is an existing product and can be purchased directly from the market. The air nozzle 5 includes a straight tube-shaped air outlet 5a, which is vertically arranged, and the lower end of the air outlet 5a is the air outlet of the air nozzle 5. The lower end of the air outlet 5a extends into the air chamber 3 through the air inlet, and the inner diameter of the air inlet is slightly larger than the outer diameter of the air outlet 5a. The lower outer wall of the air outlet 5a is provided with an external thread, and a connecting sleeve 6 is connected to the lower external thread of the air outlet 5a. The upper outer wall of the air outlet 5a has an annular limiting member 5b, which is coaxially arranged with the air outlet 5a. The inner and outer sides of the top wall of the tank body 1 are pressed against the top wall of the connecting sleeve 6 and the bottom wall of the limiting member 5b, respectively, to form a seal. A rubber pad 7 is fixed on the bottom wall of the connecting sleeve 6. The rubber pad 7 is annular and coaxial with the air outlet 5a. The rubber pad 7 is located below the air outlet 5a, and its upward projection completely covers the connecting sleeve 6. In actual products, the thickness of the rubber pad 7 is 5mm to 9mm.

[0027] The rubber pad 7 is placed below the air outlet 5a, and the upward projection of the rubber pad 7 completely covers the connecting sleeve 6. In actual use, the rubber pad 7 replaces the connecting sleeve 6 in contact with the water-inflated bladder 2. Since the rubber pad 7 is relatively soft and has good elasticity, this can effectively prevent the bladder 2 from rupturing, thereby extending the life of the pressure tank.

[0028] During assembly, simply insert the lower end of the outlet 5a into the air chamber 3 through the air inlet, and then screw in the connecting sleeve 6 to make it contact and limit the contact with the top wall of the tank body 1. This completes the assembly of the air nozzle 5 and the tank body 1. This assembly method is not only compatible with most air nozzles 5 with external threads on the market, but also has strong versatility, which greatly reduces the difficulty and cost of procurement. Moreover, the entire assembly process has fewer steps and has the advantages of convenient and easy assembly.

[0029] In this embodiment,

[0030] like Figure 2 and Figure 3 As shown, the connecting sleeve 6 is an integral structure, consisting of a cylindrical portion 6a and a tube portion 6b arranged coaxially. The tube portion 6b is formed on the top wall of the cylindrical portion 6a, and is threadedly connected to the air outlet end 5a. The top wall of the tube portion 6b presses against the top wall of the tank body 1. The shape and size of the rubber gasket 7 match the inner hole of the cylindrical portion 6a. The rubber gasket 7 is embedded inside the cylindrical portion 6a, with its lower side extending out of the cylindrical portion 6a. An annular retaining edge 7a, coaxial with the rubber gasket 7, is formed on the lower outer wall of the rubber gasket 7, pressing against and covering the bottom wall of the cylindrical portion 6a. This design increases the contact area between the rubber gasket 7 and the connecting sleeve 6, improving the positioning stability and strength of the rubber gasket 7, and allowing it to better contact the bladder 2. Preferably, the contact area between the rubber gasket 7 and the cylindrical portion 6a is coated with adhesive to increase the positioning strength and stability of the rubber gasket 7.

[0031] To further explain, the axial cross-section of the cylinder wall of section 6a is approximately inverted L-shaped, and section 6a consists of an upper ring section 6a1 and a lower ring section 6a2; the aforementioned tube section 6b is disposed on the upper ring section 6a1, the inner diameter of the upper ring section 6a1 is smaller than the inner diameter of the tube section 6b, and the inner diameter of the lower ring section 6a2 is larger than the outer diameter of the tube section 6b. This design increases the size of the rubber pad 7 by enlarging the inner diameter of the cylinder section 6a, allowing it to make a more flat contact with the bladder 2 and better protect the bladder 2.

[0032] Furthermore, the inner wall of the lower ring section 6a2 is a conical surface 6a3 whose diameter increases from top to bottom, and the outer wall of the rubber pad 7 has a conical surface 2 that matches the conical surface 6a3. The conical surface 6a3 and the conical surface 2 are in close contact to improve the installation accuracy of the rubber pad 7.

[0033] like Figure 2 and Figure 3As shown, an annular groove coaxial with the tube 6b is formed on the top wall of the tube 6b. A rubber ring 8 is provided in the annular groove, and the two ends of the rubber ring 8 are pressed against the top wall of the tank body 1 and the bottom wall of the annular groove, respectively, to increase the sealing performance between the connecting sleeve 6 and the top wall of the tank body 1. Further, the top wall of the rubber gasket 7 extends upward to form an annular sealing part 7b. The sealing part 7b passes through the inner hole of the upper annular section 6a1 and presses against the bottom wall of the air outlet 5a to extend the sealing path formed between the connecting sleeve 6 and the air outlet 5a, prevent air leakage, and ensure the stable operation of the pressure tank. At this time, the inner holes of the sealing part 7b and the rubber gasket 7 together form a conical hole 7c. The diameter of the conical hole 7c gradually increases from top to bottom, and the minimum diameter of the conical hole 7c is larger than the inner diameter of the air outlet 5a, so that the lower end of the air outlet 5a is unobstructed, ensuring that the gas is smoothly and quickly discharged into the air chamber 3.

[0034] The specific structure of the limiting component 5b is as follows: The limiting component 5b is a limiting seat integrally formed on the upper outer wall of the air outlet 5a, and the limiting seat is annular and coaxial with the air outlet 5a. Air nozzles 5 with limiting seats are also quite common in the market, further reducing procurement difficulty. Preferably, the outer surface of the limiting seat is polygonal to facilitate tightening of the air nozzle 5 with tools.

[0035] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the external thread extends to the upper outer wall of the air outlet 5a. The limiting member 5b is an annular gasket fitted on the upper end of the air outlet 5a and a pressure cap threadedly connected to the upper end of the air outlet 5a. The top and bottom surfaces of the annular gasket are pressed tightly against the pressure cap and the tank body 1, respectively.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An improved pressure tank air inlet assembly, the pressure tank including a tank body (1) and a bladder (2) disposed inside the tank body (1), and a closed air chamber (3) is formed between the outer wall of the bladder (2) and the inner wall of the tank body (1), and an air inlet communicating with the air chamber (3) is penetrating through the top of the tank body (1), the air inlet assembly including an air nozzle (5) disposed outside the tank body (1), the air nozzle (5) including a tubular air outlet end (5a), the lower end of the air outlet end (5a) extending into the air chamber (3) through the air inlet, and an external thread provided on the outer wall of the lower end of the air outlet end (5a), characterized in that, The lower end of the air outlet (5a) is externally threaded with a connecting sleeve (6). The upper outer wall of the air outlet (5a) has an annular limiting member (5b). The inner and outer sides of the top wall of the tank (1) are pressed against the top wall of the connecting sleeve (6) and the bottom wall of the limiting member (5b) respectively to form a seal. A rubber pad (7) is fixed on the bottom wall of the connecting sleeve (6). The rubber pad (7) is annular and coaxial with the air outlet (5a). The rubber pad (7) is located below the air outlet (5a), and the upward projection of the rubber pad (7) completely covers the connecting sleeve (6).

2. The improved pressure tank air inlet assembly according to claim 1, characterized in that, The connecting sleeve (6) mentioned above consists of a cylindrical part (6a) and a tube part (6b) arranged coaxially. The tube part (6b) is formed on the top wall of the cylindrical part (6a) and is threadedly connected to the air outlet (5a). The shape and size of the rubber pad (7) are matched with the inner hole of the cylindrical part (6a). The rubber pad (7) is embedded in the cylindrical part (6a). The lower side of the rubber pad (7) extends out of the cylindrical part (6a). An annular retaining edge (7a) coaxial with the rubber pad (7) is formed on the lower outer wall of the rubber pad (7). The annular retaining edge (7a) presses against and covers the bottom wall of the cylindrical part (6a).

3. The improved pressure tank air inlet assembly according to claim 2, characterized in that, The axial cross section of the cylinder wall of the cylinder section (6a) is approximately inverted L-shaped, and the cylinder section (6a) is composed of an upper ring section (6a1) and a lower ring section (6a2); the aforementioned tube section (6b) is arranged on the upper ring section (6a1), the inner diameter of the upper ring section (6a1) is smaller than the inner diameter of the tube section (6b), and the inner diameter of the lower ring section (6a2) is larger than the outer diameter of the tube section (6b).

4. The improved pressure tank air inlet assembly according to claim 3, characterized in that, The top wall of the rubber pad (7) extends upward and is integrally formed with an annular sealing part (7b). The sealing part (7b) passes through the inner hole of the upper ring section (6a1) and presses against the bottom wall of the air outlet end (5a).

5. The improved pressure tank air inlet assembly according to claim 4, characterized in that, The inner holes of the sealing part (7b) and the rubber gasket (7) together form a conical hole (7c). The diameter of the conical hole (7c) gradually increases from top to bottom, and the minimum diameter of the conical hole (7c) is greater than the inner diameter of the air outlet end (5a).

6. The improved pressure tank air inlet assembly according to claim 2, characterized in that, An annular groove coaxial with the tube (6b) is provided on the top wall of the tube (6b), and a rubber ring (8) is provided in the annular groove. The two ends of the rubber ring (8) are pressed against the top wall of the tank body (1) and the bottom wall of the annular groove, respectively.

7. The improved pressure tank air inlet assembly according to claim 3, characterized in that, The inner wall of the lower ring section (6a2) is a cone surface one (6a3) whose diameter increases from top to bottom. The outer wall of the rubber pad (7) has a cone surface two that matches the cone surface one (6a3), and the cone surface one (6a3) and the cone surface two are in close contact.

8. The improved pressure tank air inlet assembly according to claim 1, characterized in that, The limiting component (5b) is a limiting seat integrally formed on the upper outer wall of the air outlet (5a), and the limiting seat is annular and coaxial with the air outlet (5a).

9. The improved pressure tank air inlet assembly according to claim 1, characterized in that, The aforementioned external thread extends to the upper outer wall of the air outlet (5a). The limiting member (5b) is an annular gasket fitted on the upper end of the air outlet (5a) and a pressure cap threadedly connected to the upper end of the air outlet (5a). The top and bottom surfaces of the annular gasket are pressed tightly against the pressure cap and the tank body (1), respectively.

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