Small direct-current pressure tank with improved structure

Abstract

The utility model provides a small direct-current pressure tank with an improved structure, and belongs to the technical field of machinery. The problem that an existing pressure tank is poor in structural stability is solved. The small direct-current pressure tank of the improved structure comprises a tank body, a leather bag arranged in the tank body and a water outlet pipe and a water inlet pipe which are fixedly arranged at the top and the bottom of the tank body respectively, a core pipe is vertically and fixedly arranged in the leather bag, the two ends of the core pipe are communicated with the water inlet pipe and the water outlet pipe respectively, and water guide holes are densely distributed in the side walls of the two ends of the core pipe. A straight-pipe-shaped filter screen is vertically arranged in the core pipe, the lower end of the filter screen abuts against the top face of the water inlet pipe, the upper end of the filter screen extends into the water outlet pipe and is detachably and fixedly connected with the water outlet pipe, and the outer diameter of the filter screen is not larger than the inner diameter of the water outlet pipe so that the filter screen can penetrate through the water outlet pipe. The small direct-current pressure tank with the improved structure is stable in structure.

Description

Technical Field

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

[0002] Pressure tanks are used in closed-loop water circulation systems to balance water volume and pressure, avoiding frequent opening of safety valves and frequent water replenishment by automatic water supply valves. They eliminate the need for water towers, resulting in lower investment and smaller footprint. They feature automatic water and air regulation, automatic operation, and energy saving. They are also automatically connected to the municipal water supply network, ensuring water supply even during power outages. After commissioning, they require no maintenance for several years. They save 70% of the investment compared to building a water tower and 60% compared to building a high-level water tank, saving on civil engineering costs. Therefore, pressure tanks are widely used.

[0003] An existing pressure tank, such as the small DC pressure tank previously proposed by the applicant (application number: 202022944275.4), includes a tank body, a bladder inside the tank body, and an outlet pipe and an inlet pipe respectively located at the top and bottom of the tank body. A core tube is vertically fixed inside the bladder. The lower end of the outlet pipe and the upper end of the inlet pipe extend into the tank body and are respectively inserted into the two ends of the core tube. Water guide holes are densely distributed on the walls of both ends of the core tube. A through hole is provided at the top of the tank body for the lower end of the outlet pipe to pass through. Its characteristic feature is... The filter screen is vertically installed inside the core tube in a straight tubular shape. An annular gap one is formed between the inlet pipe and the core tube, and an annular gap two is formed between the outlet pipe and the core tube. The width of the annular gap one is greater than the thickness of the filter screen wall. The shape and size of the annular gap two are matched with the filter screen. The lower end of the filter screen is inserted into the annular gap one, and the upper end of the filter screen is clamped in the annular gap two. The diameter of the through hole is greater than the outer diameter of the filter screen. The wall of the through hole and the outer wall of the outlet pipe are sealed by a rubber ring, and the rubber ring is fixedly connected to the outlet pipe.

[0004] In the actual product, the tank body includes a tank cover, and the aforementioned through hole is located on the tank cover. When using the aforementioned pressure tank, a relatively large force needs to be applied to the water outlet pipe. Since the tank cover itself is not very thick, it is easy for the tank cover to bend and deform during the forceful insertion and removal of the water outlet pipe, affecting the sealing performance between the water outlet pipe and the tank cover, thereby affecting the use of the pressure tank. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a small DC pressure tank with a stable and improved structure.

[0006] The purpose of this utility model can be achieved through the following technical solution: a small DC pressure tank with an improved structure, including a tank body, a bladder disposed in the tank body, and an outlet pipe and an inlet pipe respectively fixed to the top and bottom of the tank body. A core tube is vertically fixed inside the bladder, and the two ends of the core tube are respectively connected to the inlet pipe and the outlet pipe. Water guide holes are densely distributed on the side walls at both ends of the core tube. A straight tubular filter screen is vertically disposed inside the core tube. The filter screen is characterized in that the lower end of the filter screen abuts against the top surface of the inlet pipe, the upper end of the filter screen extends into the outlet pipe and the two are detachably fixed together, and the outer diameter of the filter screen is not greater than the inner diameter of the outlet pipe so that the filter screen can pass through the outlet pipe.

[0007] When cleaning the filter screen, first disconnect the water outlet pipe from the water receiving component, then disconnect the water outlet pipe from the filter screen. Next, use tools to hook or suck the filter screen to extend it through the water outlet pipe for cleaning.

[0008] This application only requires two steps: removing and installing the filter screen and moving the filter screen. The filter screen can be taken out for cleaning or placed in a position. Throughout the process, the water outlet pipe remains in a fixed state, effectively reducing the number of parts to be disassembled and assembled, and keeping the overall structure of the pressure tank stable.

[0009] In the aforementioned improved structure of the small DC pressure tank, the filter screen consists of a ring and a barrel-shaped filter screen body. The ring is fitted over the upper end of the filter screen body and the two are fixedly connected. The ring is located inside the outlet pipe and the two are detachably fixedly connected. The bottom of the filter screen body presses against the top surface of the inlet pipe. The filter screen is connected to the outlet pipe through the ring, which enhances the positioning strength and stability of the filter screen and ensures stable operation of the pressure tank.

[0010] In the aforementioned improved structure of the small DC pressure tank, the outer wall of the ring body is provided with external threads, and the inner wall of the outlet pipe is provided with internal threads that match the external threads. The ring body also has a linkage part for engaging with a tool to drive its rotation. The ring body and the outlet pipe are connected by a threaded connection, so that the filter screen moves along with the ring body during rotation. This not only simplifies the structure but also makes it easier to install and remove the filter screen.

[0011] In the improved small DC pressure tank described above, the upper inner hole of the ring is a polygonal hole, and the linkage part also has the aforementioned polygonal hole. This design offers the advantage of structural simplicity.

[0012] As an alternative, in the aforementioned improved structure of the small DC pressure tank, the linkage is a ring of insertion holes formed on the top surface of the ring.

[0013] In the aforementioned improved small DC pressure tank, an annular step is provided on the inner wall of the outlet pipe. The annular step is composed of a vertically arranged step side wall and a step bottom wall. The ring body is threadedly connected to the step side wall, and the bottom surface of the ring body presses against the step bottom wall to restrict the downward movement of the ring body, so that the filter screen can be installed in place at one time, which facilitates the installation and removal of the filter screen.

[0014] In the improved small DC pressure tank described above, the outer diameter of the filter body is smaller than the inner diameter of the outlet pipe, making it easier to insert and remove the filter.

[0015] As an alternative, in the aforementioned improved structure of the small DC pressure tank, a threaded hole 1 is radially penetrating the side wall of the water outlet pipe, and a corresponding threaded hole 2 is provided on the side wall of the ring body. The same screw is screwed into both threaded holes 1 and 2, with the screw head outside the water outlet pipe. With the cooperation of threaded holes 1 and 2 and the screw, the water outlet pipe and the filter screen can also be detachably and fixedly connected.

[0016] Compared with existing technologies, the improved small DC pressure tank has the following advantages:

[0017] 1. This application only requires two steps: removing and assembling the filter screen and moving the filter screen. The filter screen can be taken out for cleaning or placed in a position. The water outlet pipe remains fixed throughout the process, effectively reducing the number of parts to be disassembled and assembled, and keeping the overall structure of the pressure tank stable.

[0018] 2. The ring body and the outlet pipe are connected by a threaded connection, so the filter screen moves along with the ring body as it rotates. This not only simplifies the structure but also makes it easier to install and remove the filter screen. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the improved small DC pressure tank.

[0020] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0021] In the diagram, 1 is the tank body; 1a is the tank lid; 2 is the bladder; 3 is the water outlet pipe; 3a is the annular step; 4 is the water inlet pipe; 5 is the air nozzle; 6 is the core tube; 6a is the water guide hole; 7 is the filter screen; 7a is the ring body; 7a1 is the linkage part; 7b is the filter screen body; and 8 is the water guide cavity. Detailed Implementation

[0022] 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.

[0023] Example 1: As Figure 1As shown, the improved small DC pressure tank includes a tank body 1, a bladder 2 inside the tank body 1, and an outlet pipe 3 and an inlet pipe 4 respectively located at the top and bottom of the tank body 1. An air nozzle 5 is installed on the top of the tank body 1.

[0024] Specifically

[0025] The tank body 1 consists of a tank body and two tank covers 1a respectively located at the top and bottom of the tank body. The tank covers 1a are fixedly connected to the tank body, and clamping openings for clamping the edge of the airbag end are formed between the two tank covers 1a and the tank body. A connecting hole is vertically penetrating the middle of each of the two tank covers 1a, and the water inlet pipe 4 and the water outlet pipe 3 are respectively inserted into the two connecting holes. The water inlet pipe 4 and the water outlet pipe 3 are respectively sealed and fixedly connected to the two tank covers 1a by welding.

[0026] A core tube 6 is vertically fixed inside the bladder 2. The two ends of the core tube 6 are connected to the inlet pipe 4 and the outlet pipe 3, respectively, and the walls of both ends of the core tube 6 are densely covered with water guiding holes 6a. In the actual product, the two ends of the core tube 6 are respectively sleeved on the upper end of the inlet pipe 4 and the lower end of the outlet pipe 3. The upper end of the core tube 6 presses against the lower tank cover 1a and the two are welded and sealed together. The inner wall of the upper end of the core tube 6 is sealed to the outer wall of the outlet pipe 3 through a sealing ring.

[0027] like Figure 1 As shown, a straight tubular filter screen 7 is vertically installed inside the core tube 6, and the filter screen 7 and the core tube 6 are coaxially arranged. At this time, an annular water guiding cavity 8 is formed between the filter screen 7 and the inner wall of the core tube 6. The lower end of the filter screen 7 presses against the top surface of the inlet pipe 4, and the upper end of the filter screen 7 extends into the outlet pipe 3, and the two are detachably fixed together. The outer diameter of the filter screen 7 is not greater than the inner diameter of the outlet pipe 3 so that the filter screen 7 can pass through the outlet pipe 3.

[0028] When cleaning the filter screen 7, first disconnect the water outlet pipe 3 from the water receiving component, then disconnect the water outlet pipe 3 from the filter screen 7, and then use tools to hook or suck the filter screen 7 through the water outlet pipe 3 to extend it out for cleaning.

[0029] This application only requires completing two steps: removing and assembling the filter screen 7 and moving the filter screen 7. This allows the filter screen 7 to be taken out for cleaning or placed in a position. Throughout the process, the water outlet pipe 3 remains in a fixed state, effectively reducing the number of parts to be disassembled and assembled, and keeping the overall structure of the pressure tank stable.

[0030] In this embodiment,

[0031] like Figure 1 and Figure 2As shown, the filter screen 7 is composed of a ring 7a1 and a barrel-shaped filter body 7b. The ring 7a1 is fitted onto the upper part of the filter body 7b and the two are fixedly connected. Preferably, the ring 7a1 and the filter body 7b are welded together. The ring 7a1 is located inside the outlet pipe 3 and the two are detachably fixed together. The bottom of the filter body 7b presses against the top surface of the inlet pipe 4. The filter screen 7 is connected to the outlet pipe 3 through the ring 7a1, which enhances the positioning strength and stability of the filter screen 7 and ensures stable operation of the pressure tank.

[0032] The connection between the ring 7a1 and the outlet pipe 3 is as follows: the outer wall of the ring 7a1 has an external thread, and the inner wall of the outlet pipe 3 has an internal thread that matches the external thread. That is, the ring 7a1 and the outlet pipe 3 are connected together by threads. The ring 7a1 also has a linkage part for engaging with a tool to drive its rotation. Because the ring 7a1 and the outlet pipe 3 are connected by threads, the filter screen 7 moves along with the ring 7a1 during rotation. This not only simplifies the structure but also makes it easier to install and remove the filter screen 7.

[0033] The outer diameter of the filter body 7b is preferably smaller than the inner diameter of the outlet pipe 3, making it easier to insert and remove the filter 7.

[0034] The upper inner hole of the ring 7a1 is a polygonal hole, and the linkage part is also a polygonal hole as described above. This design offers the advantage of a simple structure.

[0035] To further explain, an annular step 3a is provided on the inner wall of the water outlet pipe 3, and the annular step 3a is coaxially arranged with the water outlet pipe 3. The annular step 3a is composed of a vertically arranged step side wall and a step bottom wall. The ring body 7a1 is threadedly connected to the step side wall, and the bottom surface of the ring body 7a1 presses against the step bottom wall to restrict the downward movement of the ring body 7a1, so that the filter screen 7 can be installed in place at one time, which facilitates the installation and removal of the filter screen 7.

[0036] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the linkage part is a ring of insertion holes formed on the top surface of the ring 7a1.

[0037] Example 3: A threaded hole 1 is radially penetrating the side wall of the water outlet pipe 3, and a corresponding threaded hole 2 is provided on the side wall of the ring body 7a1. The same screw is screwed into both threaded holes 1 and 2, with the screw head outside the water outlet pipe 3. With the cooperation of threaded holes 1 and 2 and the screw, the water outlet pipe 3 and the filter screen 7 can also be detachably and fixedly connected.

[0038] 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. A small DC pressure tank with an improved structure, comprising a tank body (1), a bladder (2) disposed within the tank body (1), and an outlet pipe (3) and an inlet pipe (4) respectively fixed to the top and bottom of the tank body (1), wherein a core tube (6) is vertically fixed inside the bladder (2), and the two ends of the core tube (6) are respectively connected to the inlet pipe (4) and the outlet pipe (3), and water guide holes (6a) are densely distributed on the side walls at both ends of the core tube (6), and a straight-tube-shaped filter screen (7) is vertically disposed inside the core tube (6), characterized in that, The lower end of the filter screen (7) presses against the top surface of the inlet pipe (4), and the upper end of the filter screen (7) extends into the outlet pipe (3) and the two are detachably fixed together. The outer diameter of the filter screen (7) is not greater than the inner diameter of the outlet pipe (3) so that the filter screen (7) can pass through the outlet pipe (3).

2. The small DC pressure tank with the improved structure according to claim 1, characterized in that, The filter screen (7) mentioned above consists of a ring (7a) and a barrel-shaped filter screen body (7b). The ring (7a) is fitted onto the upper part of the filter screen body (7b) and the two are fixedly connected. The ring (7a) is located inside the water outlet pipe (3) mentioned above and the two are detachably fixedly connected. The bottom of the filter screen body (7b) presses against the top surface of the water inlet pipe (4).

3. The small DC pressure tank with the improved structure according to claim 2, characterized in that, The outer wall of the ring (7a) is provided with an external thread, the inner wall of the water outlet pipe (3) is provided with an internal thread that matches the external thread, and the ring (7a) is provided with a linkage part (7a1) for cooperating with a tool to drive the ring (7a) to rotate.

4. The small DC pressure tank with the improved structure according to claim 3, characterized in that, The upper end of the ring (7a) has a polygonal hole, and the linkage part (7a1) has the aforementioned polygonal hole.

5. The small DC pressure tank with the improved structure according to claim 3, characterized in that, The linkage part (7a1) is a ring of insertion holes formed on the top surface of the ring (7a).

6. The small DC pressure tank with the improved structure according to claim 3, characterized in that, The inner wall of the water outlet pipe (3) is provided with an annular step (3a). The annular step (3a) is composed of a vertically arranged step side wall and a step bottom wall. The ring body (7a) is threadedly connected to the step side wall, and the bottom surface of the ring body (7a) presses against the step bottom wall.

7. The small DC pressure tank with the improved structure according to claim 2, characterized in that, The outer diameter of the filter body (7b) is smaller than the inner diameter of the outlet pipe (3).

8. The small DC pressure tank with the improved structure according to claim 1, characterized in that, A threaded hole 1 is radially penetrating the side wall of the water outlet pipe (3), and a corresponding threaded hole 2 is provided on the side wall of the ring body (7a). The same screw is screwed into the threaded hole 1 and the threaded hole 2, and the head of the screw is outside the water outlet pipe (3).

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