Bag type pressure barrel

Abstract

The utility model discloses a bag type pressure barrel which comprises an upper barrel body and a lower barrel body, the lower barrel body is provided with a closing-in step matched with the upper barrel body in an inserted mode, and the closing-in step is provided with an annular protrusion protruding towards the axis direction. The end portion of the closing-in step is located between the highest point of the annular protrusion and the inner circumferential face of the upper barrel body in the radial direction, the annular protrusion is arranged on the side wall of the closing-in step, after the closing-in step is installed in place, the distance between the annular protrusion and the axis is closer than the distance between the end portion and the axis, and in this way, after welding, the welding quality is improved. Even if the end portion of the closing-up step tilts due to stress concentration, due to the arrangement of the annular protrusion, the distance between the annular protrusion and the side wall of the inner capsule body is closer, the capsule body can be supported through the annular protrusion, the probability that the capsule body makes contact with the end portion is reduced, and therefore the capsule body can be effectively prevented from being abraded due to the fact that the capsule body makes contact with the end portion, and the service life of the capsule body is prolonged. The service life of the bag body is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of water supply pressure tank equipment, and in particular to a bladder-type pressure tank. Background Technology

[0002] The bladder-type pressure tank is a water supply device used in boilers, air conditioners, etc. It consists of an outer tank and an air bladder installed inside the tank. Currently, the tank is mostly composed of an upper tank and a lower tank welded together. In order to improve the sealing performance of the weld, Chinese utility model patent application number 2024212913448 discloses an expansion tank in which the upper tank and the lower tank are inserted together by a tapering step. The outer circumference of the upper tank is flush with the outer circumference of the lower tank. The welding is carried out at the joint between the upper tank and the lower tank, and a circumferential weld is performed at the joint to achieve welding fixation and seal at the same time, preventing the leakage of internal high-pressure air and ensuring the overall quality of the expansion tank.

[0003] However, in practical applications, it has been found that because the constriction step is inserted into the tank body, when welding at the junction of the upper and lower tank bodies, local heating occurs, and stress concentration occurs after cooling, causing the end of the constriction step to locally warp. During use, the warped area may rub against the outer wall of the inner airbag, causing damage to the airbag sidewall and reducing the service life of the airbag. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a bladder-type pressure tank.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: a bladder-type pressure tank, comprising an upper tank body and a lower tank body, wherein the lower tank body is provided with a constricting step that is inserted and fitted into the upper tank body, and the constricting step is provided with an annular protrusion that protrudes in the axial direction; along the radial direction, the end of the constricting step is located between the highest point of the annular protrusion and the inner circumferential surface of the upper tank body.

[0006] Furthermore, the sidewall of the tapering step includes a first bent portion that bends toward the axis, a second bent portion that connects to the first bent portion and bends away from the axis, and the annular protrusion is the junction area of ​​the first bent portion and the second bent portion.

[0007] Furthermore, on the side of the upper barrel body located away from the lower barrel body, a third bend is provided on the side wall of the upper barrel body, bent in the axial direction.

[0008] Furthermore, it also includes a bladder, which is coaxially arranged with the pressure tank, and the opening of the bladder is sealed to the opening of the lower tank.

[0009] Furthermore, the opening of the lower barrel includes a cylindrical extension section and an outer edge disposed on the outer periphery of the extension section. A connector is provided at the extension section, and the connector is limited to the outer edge. The connector is detachably provided with a water tap flange. The bladder includes an edge disposed between the water tap flange and the connector, and the edge is sealed to the water tap flange and the connector.

[0010] Furthermore, the connector includes a step that mates with the outer edge, an annular groove is provided on the side opposite to the upper barrel, and an annular part is integrally provided at the end of the edge, the cross section of the annular groove being a semicircle adapted to the annular part.

[0011] Furthermore, the faucet flange has a positioning groove on the side near the barrel body. The positioning groove includes a first arc-shaped end and a second arc-shaped end. The first arc-shaped end abuts against the annular part, and the area where the edge and the extension section meet abuts against the second arc-shaped end.

[0012] Compared with the prior art, the bladder-type pressure tank disclosed in this utility model has the following advantages: An annular protrusion is provided on the side wall of the constriction step. After installation, the distance between the annular protrusion and the axis is closer than the distance between the end and the axis. Thus, even if the end of the constriction step warps due to stress concentration after welding, the annular protrusion will be closer to the side wall of the inner bladder due to its arrangement. The annular protrusion can support the bladder and reduce the probability of the bladder contacting the end, thereby effectively avoiding wear caused by the contact between the bladder and the end and improving the service life of the bladder. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a bladder-type pressure tank according to this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of a bladder-type pressure tank according to the present invention.

[0015] Figure 3 for Figure 2 The diagram shows a partially enlarged structural schematic of point A in this utility model.

[0016] Figure 4 for Figure 2 The diagram shown is a partially enlarged structural schematic diagram of point B in the first embodiment of this utility model.

[0017] Figure 5 for Figure 2 The diagram shows a partially enlarged structural schematic at point B in the second embodiment of this utility model.

[0018] Figure 6 This is a schematic diagram of the connecting component in a bladder-type pressure tank according to the present invention. Figure 1 .

[0019] Figure 7 This is a schematic diagram of the connecting component in a bladder-type pressure tank according to the present invention. Figure 2 .

[0020] In the diagram: 10. Upper barrel; 101. Inflation port; 102. Third bend; 11. Lower barrel; 110. Closing step; 111. First bend; 112. Second bend; 113. End; 114. Annular protrusion; 115. Outer edge; 116. Extension section; 2. Water nozzle flange; 21. Positioning groove; 210. First arc-shaped end; 211. Second arc-shaped end; 3. Connector; 31. Body; 32. Connecting part; 301. Annular groove; 302. Step; 303. First threaded hole; 304. Insertion groove; 305. Insertion part; 4. Bag body; 41. Edge; 42. Annular part; 43. Annular rib. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Example 1

[0023] Please refer to Figure 1-3 The technical solution of this utility model is as follows: a bladder-type pressure tank, including an upper barrel 10 and a lower barrel 11, wherein the lower barrel 11 is provided with a constricting step 110 that is inserted and matched with the upper barrel 10, and the constricting step 110 is provided with an annular protrusion 114 protruding in the axial direction; along the radial direction, the end 113 of the constricting step 110 is located between the highest point of the annular protrusion 114 and the inner circumferential surface of the upper barrel 10.

[0024] For details, please refer to Figures 1-3 The present application provides a bladder-type pressure tank comprising an upper tank body 10 and a lower tank body 11. The lower tank body 11 is provided with a tapering step 110, which is inserted into and fitted with the upper tank body 10. (See reference...) Figure 3 When the lower end of the upper barrel 10 abuts against the step of the constriction step 110, it is inserted into place, and then the lower end of the upper barrel 10 and the constriction step 110 are welded together, thus welding the upper barrel 10 and the lower barrel 11 together. (Refer to...) Figure 2 , Figure 3In this application, an annular protrusion 114 is provided on the side wall of the closing step 110. After installation, the distance between the annular protrusion 114 and the axis is closer than the distance between the end 113 and the axis. Thus, after welding, even if the end 113 of the closing step 110 warps due to stress concentration, the annular protrusion 114 will be closer to the side wall of the inner bladder 4 due to its provision. The annular protrusion 114 can support the bladder 4 and reduce the probability of the bladder 4 contacting the end 113, thereby effectively avoiding wear caused by the contact between the bladder 4 and the end 113 and improving the service life of the bladder 4.

[0025] Furthermore, as a specific implementation method, refer to Figure 3 The sidewall of the tapering step 110 includes a first bent portion 111 that bends toward the axis, and a second bent portion 112 that is connected to the first bent portion 111 and bends away from the axis. The annular protrusion 114 is the junction area of ​​the first bent portion 111 and the second bent portion 112.

[0026] For details, please refer to Figure 3 In specific processing, the annular protrusion 114 can be processed using a bending process. Specifically, a first bent portion 111 and a second bent portion 112 are formed by bending, with their ends connected sequentially. This creates an annular protrusion 114 at the intersection of the first bent portion 111 and the second bent portion 112. The end portion 113 is then bent away from the axis. On the one hand, the annular protrusion 114 limits the position of the bladder 4; on the other hand, the end portion 113, facing away from the bladder 4, further reduces the probability of friction between the bladder 4 and the end portion 113. It should be noted that when processing the first bent portion 111 and the second bent portion 112, the radial dimension of the end portion 113 must not exceed the radial dimension of the inner circumference of the upper barrel 10 to ensure that it can be inserted and fitted into the upper barrel.

[0027] Furthermore, as a preferred embodiment, reference continues to be made to... Figure 3 Located on the side of the upper barrel 10 away from the lower barrel 11 at the end 113, a third bend 102 is provided on the side wall of the upper barrel 10, bent in the axial direction. (Reference) Figure 3 In a specific implementation, a third bend 102 is formed on the side wall of the upper barrel 10 by a bending process. By setting the third bend 102, when the upper barrel 10 and the lower barrel 11 are inserted into place, the end 113 abuts against the root of the third bend 102. Also, by setting the third bend 102, a protrusion is formed in the connection area between the end 113 of the third bend 102 and the side wall of the upper barrel 10. At this time, the end 113 of the third bend 102 and the annular protrusion 114 below it together limit the bladder 4, thereby further reducing the probability of the bladder 4 contacting the end 113.

[0028] Furthermore, as a preferred embodiment, refer to Figure 4 , Figures 6-7 It also includes a bladder 4, which is coaxially arranged with the pressure tank, and the opening of the bladder 4 is sealed to the opening of the lower tank 11.

[0029] Furthermore, the opening of the lower barrel 11 includes a cylindrical extension 116 and an outer edge 115 disposed on the outer circumferential surface of the extension 116. A connector 3 is provided at the extension 116, and the connector 3 is in a limiting fit with the outer edge 115. A water nozzle flange 2 is detachably provided on the connector 3. The bladder 4 includes an edge 41 disposed between the water nozzle flange 2 and the connector 3, and the edge 41 is in a sealing fit with the water nozzle flange 2 and the connector 3. Specifically, by coaxially arranging the bladder 4 with the pressure tank, the swing amplitude is uniform when the bladder 4 shakes, thereby reducing the probability of the bladder 4 tilting excessively to one side and causing excessive local deformation, thus contacting the end 113, further reducing the probability of the bladder 4 contacting the end 113.

[0030] Furthermore, as a specific implementation, the connector 3 includes a step 302 that mates with the outer edge 115, an annular groove 301 is provided on the side opposite to the upper barrel 10, and an annular member 42 is integrally provided at the end 113 of the edge 41. The cross section of the annular groove 301 is a semi-circle that matches the annular member 42.

[0031] For details, please refer to Figure 6 , Figure 7 The connector 3 includes two semi-annular bodies 31, each with a connecting portion 32 at both ends. One connecting portion 32 has a second threaded hole, and the other has a through hole for a screw to pass through. The screw can be threaded through the through hole to connect with the second threaded rod, thereby fixing the two bodies 31 together. The connector 3 includes a step 302. (See reference...) Figure 4 When the connector 3 is installed on the lower barrel 11, the connector 3 surrounds the outside of the extension section 116, and the step 302 mates with the outer edge 115. The end of the connector 3 away from the step 302 and the area where the lower barrel 11 and the extension section 116 meet are abutted and limited, thereby axially limiting the connector 3. At this time, the side of the connector 3 opposite to the lower barrel 11 is on the same plane as the end face of the outer edge 115. The bladder 4 includes an outwardly expanding edge 41 and an annular part 42 provided on the side of the edge 41 near the lower barrel 11. The connector 3 is provided with an annular groove 301. (Refer to...) Figure 4 The annular component 42 can be disposed within the annular groove 301.

[0032] Furthermore, the faucet flange 2 has a positioning groove 21 on the side near the barrel body. The positioning groove 21 includes a first arc-shaped end 210 and a second arc-shaped end 211. The first arc-shaped end 210 abuts against the annular part 42, and the area where the edge 41 and the extension section 116 intersect abuts against the second arc-shaped end 211. Specifically, the connector 3 has multiple first threaded holes 303 around its axis, and the faucet flange 2 has multiple through holes that are adapted to the first threaded holes 303. Thus, a screw can be passed through the through holes to connect to the second threaded holes, thereby pressing the edge 41 between the faucet flange 2 and the connector 3 to form a sealing fit. In a preferred embodiment, a positioning groove 21 is provided on the surface of the faucet flange 2. The positioning groove 21 includes a first arc-shaped end 210 and a second arc-shaped end 211. When the faucet flange 2 is installed on the connector 3, the first arc-shaped end 210 and the second arc-shaped end 211 respectively abut against the area where the edge 41 and the extension section 116 intersect and the annular part 42. The first arc-shaped end 210 and the second arc-shaped end 211 abut against the edge 41, thereby forming a sealing fit. This provides a good sealing effect and eliminates the need for additional sealing rings.

[0033] Further, refer to Figure 7 One body 31 is provided with a plug groove 304, and the other body 31 is provided with a plug part 305. The plug groove 304 and the plug part 305 are plugged and positioned together. With this arrangement, when the two bodies 31 are plugged and connected, the plug groove 304 and the plug part 305 are plugged and positioned together to ensure the assembly accuracy of the two bodies 31.

[0034] Example 2

[0035] Please refer to Figure 5 The technical solution of this utility model is: a bladder-type pressure tank, which differs from the first embodiment in that an annular rib 43 is also provided inside the annular part 42. The annular rib 43 is made of steel wire and is positioned and supported by the annular part 42. It provides rigid support when the water nozzle flange 2 clamps the annular part 42, ensuring that the outer surface of the annular part 42 is in close contact with the first arc-shaped end 210 to improve the sealing effect.

[0036] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A bladder pressure tank comprising an upper tank body (10) and a lower tank body (11), the lower tank body (11) being provided with a counterbore step (110) for plug-in cooperation with the upper tank body (10), characterized in that, The closing step (110) is provided with an annular protrusion (114) protruding towards the axial direction; in the radial direction, the end (113) of the closing step (110) is located between the highest point of the annular protrusion (114) and the inner circumferential surface of the upper barrel body (10).

2. A bladder pressure vessel according to claim 1, wherein, The side wall of the closing step (110) comprises a first bending portion (111) bent towards the axial direction, a second bending portion (112) connected with the first bending portion (111) and bent away from the axial direction, and the annular protrusion (114) is the intersection area of the first bending portion (111) and the second bending portion (112).

3. A bladder pressure vessel according to claim 2, wherein, A third bending portion (102) is arranged on the side wall of the upper barrel body (10) and bent towards the axial direction.

4. A bladder pressure vessel according to claim 2, wherein, Further comprising a capsule (4) coaxially arranged with the pressure barrel, and the opening of the capsule (4) is sealingly matched with the opening of the lower barrel body (11).

5. A bladder pressure vessel according to claim 4, wherein, The opening of the lower barrel body (11) comprises a cylindrical extension section (116) and an outer edge (115) arranged on the outer circumferential surface of the extension section (116), and the extension section (116) is provided with a connecting piece (3) which is limitingly matched with the outer edge (115), and the connecting piece (3) is detachably provided with a water nozzle flange (2), and the capsule (4) comprises an edge (41) arranged between the water nozzle flange (2) and the connecting piece (3), and the edge (41) is sealingly matched with the water nozzle flange (2) and the connecting piece (3).

6. A bladder pressure vessel according to claim 5, wherein, The connecting piece (3) comprises a step (302) matched with the outer edge (115), and an annular groove (301) is arranged on the side opposite to the upper barrel body (10), and the end (113) of the edge (41) is integrally provided with an annular member (42), and the cross section of the annular groove (301) is semicircular which is matched with the annular member (42).

7. A bladder pressure vessel according to claim 6, wherein, The water nozzle flange (2) is provided with a positioning groove (21) on the side close to the barrel body, and the positioning groove (21) comprises a first arc-shaped end (210) and a second arc-shaped end (211), the first arc-shaped end (210) is abuttingly matched with the annular member (42), and the area where the edge (41) and the extension section (116) intersect is abuttingly matched with the second arc-shaped end (211).

Images