Brazed plate heat exchanger pressure-bearing strength detection device

Abstract

The utility model relates to the technical field of bearing strength detection, in particular to a brazing plate heat exchanger bearing strength detection device which comprises a top plate, telescopic rods which are vertically arranged and fixedly connected with the bottom end of the top plate are symmetrically arranged at the bottom end of the top plate, and flow dividers are fixedly connected with the bottom ends of the telescopic rods. An air inlet pump communicated with the flow divider is arranged above the flow divider, a pressure gauge communicated with the flow divider is fixedly connected to the front side of the flow divider, air outlet pipes fixedly connected with the flow divider and communicated with the flow divider are symmetrically arranged at the bottom end of the flow divider, and fixing blocks fixedly connected with the bottom end of the flow divider are fixedly connected to the outer sides of the air outlet pipes. A groove is formed in the bottom end of the fixing block, and a first magnet located on the outer side of the air outlet pipe is fixedly connected to the top end of the inner side of the groove, and the air outlet pipe, the fixing block, the groove, the first magnet, the second magnet and the sealing ring are arranged, so that the sealing ring can be replaced more conveniently, and the cost for replacing the sealing ring is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure bearing strength detection, in particular to a pressure bearing strength detection device for a brazed plate heat exchanger. Background Art

[0002] Brazed plate heat exchanger is a new type of high-efficiency heat exchanger made of a series of metal sheets with a certain corrugated shape stacked and brazed. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates. Compared with conventional shell and tube heat exchangers, its heat transfer coefficient is much higher under the same flow resistance and pump power consumption. It has a tendency to replace shell and tube heat exchangers within the applicable scope. The pressure strength testing device is a device specially used to test the pressure strength and pressure resistance of samples under the action of air pressure. Brazed plate heat exchangers must undergo pressure strength testing before leaving the factory, and can only leave the factory if the pressure strength meets the requirements.

[0003] When using a pressure strength testing device, a certain amount of gas is generally injected into the heat exchanger, and then it is observed whether there is any leakage after a period of rest. When injecting gas into the inside of the heat exchanger, a sealing ring is required to seal to prevent leakage at the connection between the device and the heat exchanger. However, the sealing ring will age after long-term use. Replacing the sealing ring requires replacing the air outlet pipe together, which has a high replacement cost. In addition, injecting gas into the heat exchanger is more dangerous. The existing device has no protective components to prevent the heat exchanger from exploding and causing harm to the operator. The device has no fixing device when inflating and may shift during the inflation process. Therefore, a pressure strength testing device for a brazed plate heat exchanger is proposed to address the above problems. Utility Model Content

[0004] The utility model aims to provide a pressure strength detection device for a brazed plate heat exchanger, so as to solve the problems in the above background technology that the sealing ring replacement cost is high and the device lacks protective components and fixing devices.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The top end of the groove is fixedly connected with a first magnet located on the outside of the groove, and a second magnet located on the outside of the groove is magnetically connected to the first magnet located on the outside of the groove, and a second magnet located on the outside of the groove is magnetically connected to the first magnet located on the outside of the groove, and a sealing ring located on the bottom of the second magnet is fixedly connected to the second magnet located on the outside of the groove, and an air inlet pipe is provided below the sealing ring, and a heat exchanger body connected to the air inlet pipe is fixedly connected to the bottom of the air inlet pipe.

[0007] Preferably, a protective box is fixedly connected to the outer side of the telescopic rod, a pillar is vertically arranged and fixedly connected to the bottom end of the base plate on one side of the telescopic rod, the bottom end of the pillar is fixedly connected to the base plate, and a fixing component is provided on the top of the base plate.

[0008] Preferably, the fixing assembly includes a first fixing frame fixedly connected to the top of the base plate, a second fixing frame slidably connected to the top of the base plate is provided on one side of the first fixing frame, a side of the second fixing frame away from the first fixing frame is fixedly connected to a horizontally arranged sliding rod, a return spring is provided on the outer side of the sliding rod, an end of the return spring away from the second fixing frame is fixedly connected to a fixing plate, and an end of the sliding rod away from the second fixing frame is fixedly connected to a handle.

[0009] Preferably, the first fixed frame and the second fixed frame are of the same shape and size, the slide rod is connected to the fixed plate by sliding connection, the end of the return spring away from the fixed plate is fixedly connected to the second fixed frame, and the fixed plate is fixedly connected to the top of the base plate.

[0010] Preferably, the air intake pump is fixedly connected to the outside of the protective box, the first magnet and the second magnet are identical in shape and size, and the top end of the air intake pipe at the bottom end of the sealing ring fits tightly.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the air outlet pipe, the fixing block, the groove, the first magnet, the second magnet and the sealing ring are arranged, so that the replacement of the sealing ring can be more convenient and the cost of replacing the sealing ring can be reduced;

[0013] 2. In the utility model, the protective box, support and bottom plate are provided to cover the heat exchanger body during the inflation process to prevent the heat exchanger body from exploding and causing injuries to personnel;

[0014] 3. In the utility model, the heat exchanger body can be fixed by the provided fixing assembly, the first fixing frame, the second fixing frame, the sliding rod, the return spring, the fixing plate and the handle to prevent the heat exchanger body from shifting during the inflation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the fixed component of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the protection box of the utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the fixing block of the utility model.

[0019] In the figure: 1. top plate; 2. telescopic rod; 3. diverter; 4. air intake pump; 5. pressure gauge; 6. air outlet pipe; 7. fixing block; 8. groove; 9. first magnet; 10. second magnet; 11. sealing ring; 12. air intake pipe; 13. heat exchanger body; 14. protective box; 15. support; 16. bottom plate; 17. fixing assembly; 1701. first fixing frame; 1702. second fixing frame; 1703. sliding rod; 1704. reset spring; 1705. fixing plate; 1706. handle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0022] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A pressure strength testing device for a brazed plate heat exchanger comprises a top plate 1, a telescopic rod 2 vertically arranged and fixedly connected to the bottom end of the top plate 1 is symmetrically provided at the bottom end of the top plate 1, a diverter 3 is fixedly connected to the bottom end of the telescopic rod 2, an air intake pump 4 communicating with the diverter 3 is provided above the diverter 3, a pressure gauge 5 communicating with the diverter 3 is fixedly connected to the front side of the diverter 3, an air outlet pipe 6 fixedly connected to the separator and communicating with the diverter 3 is symmetrically provided at the bottom end of the diverter 3, and an air outlet pipe 6 is fixedly connected to the outside of the air outlet pipe 6 There is a fixed block 7 fixedly connected to the bottom end of the diverter 3, a groove 8 is opened at the bottom end of the fixed block 7, a first magnet 9 located on the outside of the air outlet pipe 6 is fixedly connected to the top inner side of the groove 8, a second magnet 10 located on the outside of the air outlet pipe 6 is magnetically connected below the first magnet 9, a sealing ring 11 located on the outside of the air outlet pipe 6 is fixedly connected to the bottom end of the second magnet 10, an air inlet pipe 12 is provided below the sealing ring 11, and a heat exchanger body 13 that penetrates the air inlet pipe 12 is fixedly connected to the bottom end of the air inlet pipe 12.

[0025] A protective box 14 is fixedly connected to the outside of the telescopic rod 2, a support 15 is vertically arranged and fixedly connected to the bottom end of the bottom plate 16 on one side of the telescopic rod 2, the bottom end of the support 15 is fixedly connected to the bottom plate 16, a fixing assembly 17 is provided at the top of the bottom plate 16, the protective box 14 can cover the heat exchanger body 13 to prevent the heat exchanger body 13 from exploding and causing injuries to people, the fixing assembly 17 includes a first fixing frame 1701 fixedly connected to the top end of the bottom plate 16, a second fixing frame 1702 is provided on one side of the first fixing frame 1701 and is slidably connected to the top end of the bottom plate 16, a horizontally arranged sliding rod 1703 is fixedly connected to the side of the second fixing frame 1702 away from the first fixing frame 1701, a return spring 1704 is provided on the outside of the sliding rod 1703, and the end of the return spring 1704 away from the second fixing frame 1702 is fixedly connected to the fixing plate 17 05, one end of the slide bar 1703 away from the second fixed frame 1702 is fixedly connected with a handle 1706, the setting of the fixing component 17 can prevent the heat exchanger body 13 from shifting during the inflation process, the first fixed frame 1701 and the second fixed frame 1702 are the same in shape and size, the slide bar 1703 is connected to the fixed plate 1705 in a sliding connection, the end of the reset spring 1704 away from the fixed plate 1705 is fixedly connected to the second fixed frame 1702, the fixed plate 1705 is fixedly connected to the top of the bottom plate 16, the reset of the reset spring 1704 can drive the inner side of the second fixed frame 1702 to fit tightly with the outer side of the heat exchanger body 13, the air intake pump 4 is fixedly connected to the outside of the protective box 14, the first magnet 9 and the second magnet 10 are the same in shape and size, and the top of the air intake pipe 12 at the bottom of the sealing ring 11 fits tightly.

[0026] Working process: Power on the device before use. When the pressure-bearing strength test of the heat exchanger body 13 is required, first use the fixing assembly 17 to fix it. First, pull the handle 1706. The handle 1706 drives the slide bar 1703 to slide inside the fixing plate 1705. The slide bar 1703 drives the second fixing frame 1702 to slide on the top of the bottom plate 16. At this time, the return spring 1704 is compressed. At this time, the heat exchanger body 13 is placed on the inner side of the first fixing frame 1701 and the second fixing frame 1702 at the top of the bottom plate 16. Release the handle 1706. The return spring 1704 returns to the original position and drives the slide bar 1703 to slide inside the fixing plate 1705. The slide bar 1703 drives the second fixing frame 1702 to slide on the top of the bottom plate 16 until the inner side of the second fixing frame 1702 is tightly fitted with the outer side of the heat exchanger body 13. The fixing of the heat exchanger body 13 can be completed. The setting of the fixing assembly 17 can prevent the heat exchanger body 13 from shifting during the inflation process. Then start the top plate 1 The telescopic rod 2 at the bottom is extended to drive the outlet pipe 6 to insert into the inner side of the inlet pipe 12 at the top of the heat exchanger body 13, until the bottom end of the sealing ring 11 is tightly fitted with the top of the inlet pipe 12. At this time, the protective box 14 moves downward with the telescopic rod 2 and covers the heat exchanger body 13 to prevent the heat exchanger body 13 from exploding and causing injuries to people. Next, the air intake pump 4 is started. The air intake pump 4 pumps the gas into the inner side of the heat exchanger body 13 through the diverter 3, the outlet pipe 6 and the inlet pipe 12. Observe the pressure gauge 5 to When the appropriate pressure is reached, the air intake pump 4 is turned off. After standing for a period of time, the pressure gauge 5 is observed to see if there is any change in the indication, so as to know whether the heat exchanger body 13 is leaking. When the sealing ring 11 is aged, the sealing ring 11 is taken out from the inner side of the groove 8 at the bottom end of the fixing block 7. At this time, the first magnet 9 is separated from the second magnet 10, and a new sealing ring 11 is taken out. The second magnet 10 is placed in the inner side of the groove 8, so that the first magnet 9 and the second magnet 10 are magnetically connected. The replacement of the sealing ring 11 can be completed, thereby reducing the replacement cost.

[0027] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for testing the pressure bearing strength of a brazed plate heat exchanger, comprising a top plate (1), characterized in that: The bottom end of the top plate (1) is symmetrically provided with a telescopic rod (2) vertically arranged and fixedly connected to the bottom end of the top plate (1); the bottom end of the telescopic rod (2) is fixedly connected to a diverter (3); an air intake pump (4) communicating with the diverter (3) is provided above the diverter (3); a pressure gauge (5) communicating with the diverter (3) is fixedly connected to the front side of the diverter (3); an air outlet pipe (6) fixedly connected to the separator and communicating with the diverter (3) is symmetrically provided at the bottom end of the diverter (3); an air outlet pipe (6) fixedly connected to the bottom end of the diverter (3) is fixedly connected to the outside of the air outlet pipe (6); A fixing block (7), wherein a groove (8) is provided at the bottom end of the fixing block (7), a first magnet (9) located outside the air outlet pipe (6) is fixedly connected to the top end of the inner side of the groove (8), a second magnet (10) located outside the air outlet pipe (6) is magnetically connected below the first magnet (9), a sealing ring (11) located outside the air outlet pipe (6) is fixedly connected to the bottom end of the second magnet (10), an air inlet pipe (12) is provided below the sealing ring (11), and a heat exchanger body (13) that is connected to the air inlet pipe (12) is fixedly connected to the bottom end of the air inlet pipe (12).

2. The pressure-bearing strength testing device for a brazed plate heat exchanger according to claim 1, characterized in that: The outer side of the telescopic rod (2) is fixedly connected to a protective box (14); one side of the telescopic rod (2) is provided with a support (15) which is vertically arranged and fixedly connected to the bottom end of a base plate (16); the bottom end of the support (15) is fixedly connected to the base plate (16); and a fixing component (17) is provided at the top end of the base plate (16).

3. The pressure-bearing strength testing device for a brazed plate heat exchanger according to claim 2, characterized in that: The fixing assembly (17) comprises a first fixing frame (1701) fixedly connected to the top of the bottom plate (16); a second fixing frame (1702) slidably connected to the top of the bottom plate (16) is provided on one side of the first fixing frame (1701); a side of the second fixing frame (1702) away from the first fixing frame (1701) is fixedly connected to a horizontally arranged sliding rod (1703); a return spring (1704) is provided on the outer side of the sliding rod (1703); an end of the return spring (1704) away from the second fixing frame (1702) is fixedly connected to a fixing plate (1705); and an end of the sliding rod (1703) away from the second fixing frame (1702) is fixedly connected to a handle (1706).

4. A brazed plate heat exchanger pressure strength testing device according to claim 3, characterized in that: The first fixed frame (1701) and the second fixed frame (1702) are of the same shape and size; the sliding rod (1703) and the fixed plate (1705) are connected by sliding connection; the end of the return spring (1704) away from the fixed plate (1705) is fixedly connected to the second fixed frame (1702); and the fixed plate (1705) is fixedly connected to the top of the bottom plate (16).

5. The device for testing the pressure strength of a brazed plate heat exchanger according to claim 1, characterized in that: The air intake pump (4) is fixedly connected to the outside of the protective box (14); the first magnet (9) and the second magnet (10) are of the same shape and size; the bottom end of the sealing ring (11) fits tightly with the top end of the air intake pipe (12).

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