Device for detecting air tightness of water pipe of generator cooler

Abstract

The utility model belongs to the technical field of air tightness detection, and particularly relates to a water pipe air tightness detection device of a generator cooler. The detection device comprises a first cover plate and a second cover plate which are used for blocking the two ends of the water pipe, a tensioning connecting piece is arranged between the first cover plate and the second cover plate, at least one end of the tensioning connecting piece is connected with the first cover plate or the second cover plate through a fastening structure, and the fastening structure comprises a threaded hole formed in the first cover plate or the second cover plate and a threaded rod matched with the threaded hole. An air inlet pipe penetrates through the first cover plate or the second cover plate, a plurality of exhaust holes are formed in an inner pipe body of the air inlet pipe, the outer side of the air inlet pipe is connected with an inflation unit, and the air inlet pipe is further connected with a barometer and an on-off valve. The air tightness detection device is firm in plugging and tight in sealing of the water pipe of the generator cooler, and has the characteristics of convenience in mounting and dismounting, safety and reliability in use and high detection efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of airtightness detection, and particularly relates to an airtightness detection device for the water pipes of a generator cooler. Background Art

[0002] The cooler is an important component of generators and large-capacity motors. Cooling water with a certain pressure flows through its pipelines to dissipate the heat generated during the operation of the motor in a timely manner. To prevent leakage of the water pipes of the cooler during operation, the staff will regularly conduct airtightness detection on the water pipes of the cooler. The usual method is to block both ends of the water pipes of the cooler, and special blocking tools are required to apply a certain gaseous or liquid pressure to the water pipes. After standing for a period of time, the test data, including the applied pressure, temperature, test time, pressure change situation, etc., are recorded in a timely manner. By analyzing the data, the airtightness of the pipeline system can be accurately judged.

[0003] Since the cooler is composed of many pipelines of equal length arranged in parallel, and dense fins are attached to the pipeline surface to increase the heat dissipation area, both ends of the cooler are sealed with water chamber covers, and one end has a flange for inlet and outlet water to connect with the external cooling water pipeline. During the airtightness test, the water chamber covers at both ends of the water pipes need to be removed. Currently, most of the used blocking tools are conical nylon pins, which are forcibly pressed into the water pipe ports by external force. This sealing method has the following disadvantages: ① After the pipeline is pressurized, the pins cannot withstand the pressure and pop out; ② The workmanship of the pins is not good, resulting in poor sealing of the pipeline; ③ When pressing the pins into the pipeline, there is a risk of damaging the pipeline. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an airtightness detection device for the water pipes of a generator cooler with reliable blocking and tight sealing, which has the characteristics of convenient installation and disassembly, safe and reliable use, and high detection efficiency.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An airtightness detection device for the water pipes of a generator cooler, characterized in that: it includes a first cover plate and a second cover plate for blocking both ends of the water pipe, a tension connecting member is arranged between the two, at least one end of the tension connecting member is connected with the first cover plate or the second cover plate through a fastening structure, the fastening structure includes a threaded hole arranged on the first cover plate or the second cover plate and a screw rod matched with the threaded hole, an air inlet pipe penetrates through the first cover plate or the second cover plate, a plurality of exhaust holes are arranged on the inner pipe body of the air inlet pipe, and its outer side is connected with an inflation unit, and the air inlet pipe is also connected with a barometer and a on-off valve.

[0007] The additional technical features constituting the above-mentioned airtightness detection device for the water pipes of a generator cooler further include:

[0008] - The first cover plate is provided with the set screw structure, the second cover plate is provided with the air inlet pipe, and the tension connecting member includes that the inner side of the screw of the set screw mechanism is threadedly connected to the inner side of the air inlet pipe, or the inner side of the screw is connected to the inner side of the air inlet pipe by a rope;

[0009] - The air inlet pipe penetrates through the second cover plate and is threadedly connected, and a set screw nut sleeved on the air inlet pipe is arranged on the outer side of the second cover plate;

[0010] - A handle or a set screw nut is arranged at the outer end of the screw of the set screw structure;

[0011] - Sealing gaskets are arranged on the inner sides of the first cover plate and the second cover plate, and the sealing gaskets are sleeved outside the screw or the air inlet pipe;

[0012] - Inflatable air cushions are arranged on the inner sides of the first cover plate and the second cover plate, the inflatable air cushions are sleeved outside the screw or the air inlet pipe, the inflatable air cushions are pre-filled with gas, or are connected to the inflation unit through a branch pipe or directly communicated with an exhaust hole on the air inlet pipe;

[0013] - The outer side of the air inlet pipe is connected to the air charging pipe of the inflation unit through a movable joint, and the barometer and the on-off valve are both arranged on the air charging pipe.

[0014] Compared with the prior art, the water pipe airtightness detection device for a generator cooler provided by the present utility model has the following advantages: the first cover plate and the second cover plate of the detection device respectively seal the two ends of the water pipe of the cooler, and the two are tensioned with each other through a tension connecting member, so that the cover plates are hermetically pressed on the water pipe nozzle. The tension connecting member rotates the threaded holes on the cover plates and the matching screws with each other to realize that the connection tension can be adjusted; secondly, the air inlet pipe is arranged through the cover plate, a plurality of exhaust holes are arranged on the inner pipe body of the air inlet pipe, the outer side of which is connected to the inflation unit, the inside of the water pipe is pressurized through an inflation device, and the air inlet pipe is also connected to a barometer and an on-off valve for judging the pressurization parameters and performing detection operations. The overall device has a simple structure, is convenient for installation and disassembly, firmly seals the water pipe, has a tight seal, improves the efficiency of airtightness detection, and has the advantages of economy, practicality, safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a water pipe airtightness detection device for a generator cooler of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The structure and working principle of the airtightness detection device for the water pipes of the generator cooler provided by the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] In the description of the present utility model, unless otherwise specified, the orientation or positional relationship indicated by terms such as "inside / outside" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0018] It should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", and "setting / equipped with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0019] As Figure 1 shown, the structure of the airtightness detection device for the water pipes of the generator cooler includes a first cover plate 11 and a second cover plate 12 for blocking both ends of the water pipe a. A tensioning connecting member is arranged between the two. At least one end of the tensioning connecting member is connected to the first cover plate 11 or the second cover plate 12 through a fastening structure. The fastening structure includes a threaded hole 21 provided on the first cover plate 11 or the second cover plate 12 and a screw rod 22 cooperating with the threaded hole 21. An air inlet pipe 3 is penetrated through the first cover plate 11 or the second cover plate 12. A plurality of exhaust holes 31 are arranged on the inner pipe body of the air inlet pipe 3, and its outer side is connected to an inflation unit 8. The air inlet pipe 3 is also connected to a barometer 41 and a on-off valve 42.

[0020] Its working principle is as follows: Place the first cover plate 11 and the second cover plate 12 of the airtightness detection device at both ends of the cooling water pipe a respectively, and tighten them with each other through a tensioning connector. Then the cover plates are blocked and tightly pressed at the pipe orifices. Since there is a screw rod 22 in the threaded hole provided on the first cover plate 11 and the air inlet pipe 3 is arranged through the second cover plate 12, after the inner end of the screw rod 22 is connected to the second cover plate 12 or to the inner end of the air inlet pipe 3, by rotating the screw rod 22, the mutual pulling and tensioning between the two end cover plates are realized. Since a number of exhaust holes 31 are arranged on the inner pipe body of the air inlet pipe 3 and its outside is connected to the inflation unit 8, the air inlet pipe 3 is also connected to a barometer 41 and a on-off valve 42. After the overall installation and positioning, open the on-off valve 42, the inflation unit pressurizes the air inlet pipe 3, and after the barometer 41 shows that the predetermined pressure is reached, close the on-off valve 42, and detect the airtightness by the barometer 41 reflecting the change of the pressure value in the water pipe.

[0021] It should be noted that the connection mode between the inner end of the screw rod 22 and the inner end of the air inlet pipe 3 can be a fixed connection or a movable connection, such as through a rotary joint, a thread connection, etc.; certain sealing measures need to be considered for the air inlet pipe 3 arranged through the second cover plate 12, such as realizing dynamic sealing contact or static sealing contact through a sealing rubber ring.

[0022] In the structure of the airtightness detection device for the water pipe of the above-mentioned generator cooler,

[0023] —— As described above, in a specific embodiment, the threaded hole and the screw rod 22 of the fastening structure are arranged on the first cover plate 11, and the air inlet pipe 3 is arranged on the second cover plate 12, adopting a symmetrical design for easy installation and use. The inner side of the screw rod 22 of the fastening mechanism of the above-mentioned tensioning connector is threadedly sleeved with the inner side of the air inlet pipe 3. That is, when the screw rod 22 is rotated, the inner end of the screw rod 22 rotates relative to the air inlet pipe 3, and the air inlet pipe 3 is in a stationary state;

[0024] When the cooling water pipe has a special form such as bending, the inner side of the above-mentioned screw rod 22 is connected to the inner side of the air inlet pipe 3 through a rope, and the rope can be a flexible connector such as a steel wire rope or a chain;

[0025] —— Preferably, the above-mentioned air inlet pipe 3 penetrates through the second cover plate 12 and is connected by a thread, that is, an external thread is arranged at the penetrating part of the air inlet pipe 3, an internal thread is arranged in the through hole of the second cover plate 12, and a fastening nut 52 sleeved on the air inlet pipe 3 is arranged outside the second cover plate 12. That is, by rotating the fastening nut 52, the relative movement of the air inlet pipe 3 relative to the second cover plate 12 is realized, and further the tension degree between the first cover plate 11 and the second cover plate 12 is adjusted;

[0026] —— Further, a handle is arranged at the outer end of the screw rod 22 of the above-mentioned fastening structure or a tightening nut 51 is sleeved, which is convenient for manual operation to realize the real-time adjustment of the tension degree between the two end cover plates;

[0027] - Preferably, sealing gaskets (61, 62) are arranged on the inner sides of the first cover plate 11 and the second cover plate 12. The sealing gaskets (61, 62) are sleeved on the screw rod 22 or the outside of the air inlet pipe 3, which not only ensures the sealing effect of the plugging, but also provides buffer protection for the nozzle of the cooling water pipe to avoid damage to the nozzle caused by the tension pressure;

[0028] - As a preferred embodiment, air-filled cushion pads (71, 72) are arranged on the inner sides of the first cover plate 11 and the second cover plate 12. The air-filled cushion pads (71, 72) are sleeved on the screw rod 22 or the outside of the air inlet pipe 3, and can be located inside or outside the sealing gaskets (61, 62) to play a role in sealing reinforcement, or can completely replace the sealing gaskets (61, 62). The air-filled cushion pads (71, 72) are pre-filled with gas, or are connected to the inflation unit 8 through a branch pipe or directly communicate with an exhaust hole 31 on the air inlet pipe 3. Through the deformation of the air-filled cushion pads (71, 72), the sealing effect at the edge of the cover plate and the nozzle, and the penetration of the screw rod 22 or the air inlet pipe 3 and the cover plate is strengthened;

[0029] - Preferably, the outside of the air inlet pipe 3 is connected to the air filling pipe 81 of the inflation unit 8 through a movable joint 80. The barometer 41 and the on-off valve 42 are both arranged on the air filling pipe 81. The inflation unit 8 selects equipment such as an air pump and a blower. The barometer 41 and the on-off valve 42 are arranged on the air filling pipe 81, which is convenient for experimental detection operations.

[0030] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not the limiting conditions for the implementation of the present invention. Therefore, any other modifications or equivalent replacements of the technical solutions of the present invention, such as configuration dimensions and internal structures, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A water pipe air tightness detection device for a generator cooler, characterized in that: It comprises a first cover plate and a second cover plate for sealing both ends of a water pipe, a tensioning connector is arranged between the two, at least one end of the tensioning connector is connected to the first cover plate or the second cover plate by a fastening structure, the fastening structure comprises a threaded hole arranged on the first cover plate or the second cover plate and a screw matched with the threaded hole, an air inlet pipe is arranged through the first cover plate or the second cover plate, a plurality of exhaust holes are arranged on the inner side of the air inlet pipe, the outer side of the air inlet pipe is connected to the inflation unit, and the air inlet pipe is also connected to a barometer and an on-off valve.

2. The water pipe air tightness detection device for a generator cooler according to claim 1, characterized in that: The first cover plate is provided with the fixing structure, the second cover plate is provided with the air intake pipe, and the tensioning connector includes an inner side of a screw of the fixing structure connected to an inner side of the air intake pipe by threads, or an inner side of the screw is connected to an inner side of the air intake pipe by a rope.

3. The water pipe air tightness detection device for a generator cooler according to claim 2, characterized in that: The air inlet pipe passes through the second cover plate and is connected by threads. A fixing nut sleeved on the air inlet pipe is arranged on the outer side of the second cover plate.

4. The water pipe air tightness detection device for a generator cooler according to claim 1, characterized in that: A handle or a sleeve tightening nut is arranged at the outer end of the screw rod of the tightening structure.

5. The water pipe air tightness detection device for a generator cooler according to claim 1, characterized in that: Sealing gaskets are arranged inside the first cover plate and the second cover plate, and the sealing gaskets are sleeved on the outside of the screw rod or the air inlet pipe.

6. A water pipe air tightness detection device for a generator cooler according to claim 1 or 5, characterized in that: An inflatable bag cushion is arranged inside the first cover plate and the second cover plate, and the inflatable bag cushion is sleeved on the outside of the screw rod or the air intake pipe. The inflatable bag cushion is pre-filled with gas, and is either connected to the inflation unit through a branch pipe or directly communicated with an exhaust hole on the air intake pipe.

7. The water pipe air tightness detection device for a generator cooler according to claim 1, characterized in that: The outer side of the air inlet pipe is connected to the air charging pipe of the air charging unit through a movable joint, and the barometer and the on-off valve are both arranged on the air charging pipe.

Images