Thermal power plant valve inner leakage detection device

Abstract

The utility model relates to the technical field of valve inner leakage detection, and particularly discloses a thermal power plant valve inner leakage detection device which comprises an inlet pipeline, an outlet pipeline is arranged at one end of the inlet pipeline, a positioning plate is arranged below the outlet pipeline, and four positioning blocks are fixedly connected in the positioning plate. Four round holes are formed in the positioning plate, a fastening screw is in threaded connection with the interior of the positioning block, a sensor penetrates through the interior of each round hole, and two first detection ports are formed in one side of the surface of the inlet pipeline; according to the utility model, the sensor, the first detection port, the sealing strip, the fastening screw and the positioning block are matched for use, so that the inner leakage detection work of the valve can be stably carried out, the detection head ensures the sealing performance when being connected with the inlet pipeline and the outlet pipeline during detection, and meanwhile, the sensor can be replaced in time when being damaged; and the smooth proceeding of valve inner leakage detection work is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve internal leakage detection technical field, concretely relates to a thermal power plant valve internal leakage detection device. BACKGROUND

[0002] Thermal power plant is short for thermal power plant, and is a factory using combustible as fuel to produce electric energy, and its basic production process is: fuel heats water to generate steam when burning, converts the chemical energy of fuel into heat energy, steam pressure drives steam turbine to rotate, converts heat energy into mechanical energy, and then steam turbine drives generator to rotate, converts mechanical energy into electric energy, among the whole fluid conveying system, valve can be said to be one of the most critical control components, and fluid conveying system can realize the control of fluid guiding, shunting, cutting and pressure relief and other related actions through effective application of valve components, under the support of current technical conditions, the commonly seen valve components of thermal power plant can be divided into three types according to different use types, namely regulating type valve components, drainage type valve components and shut-off type valve components, but valve plays a huge role in the whole stable operation process of thermal power plant, valve internal leakage will make the equipment in operation unable to isolate and eliminate defects, mainly reflected in that safety measures cannot be implemented in place, which seriously threatens the life safety of maintenance workers, and the working medium after heating and pressure increasing is directly leaked and discharged into the ditch without utilization, and the high-temperature and high-pressure working medium is directly discharged into the condenser without utilization, which leads to the increase of condenser heat load, the decrease of unit vacuum and the obvious decrease of steam turbine efficiency, and when the equipment eliminates defects, the valve internal leakage makes the safety measures unable to be implemented in place and unable to be withdrawn, or unable to be maintained after withdrawal, which leads to the decrease of unit operation economy, therefore, a safe and reliable detection device is needed for detecting the valve internal leakage of thermal power plant, but the existing part of valve internal leakage detection devices often has certain deficiencies in use, and needs to be improved.

[0003] In the Chinese patent with publication number CN215065101U, a thermal power plant valve internal leakage detection device is mentioned, the detection device includes a valve, an inlet pipe connected to the inlet of the valve and an outlet pipe connected to the outlet of the valve, detection points are arranged on the inlet pipe and the outlet pipe, sensors are installed at the positions of the detection points, the sensors are connected to a signal processor, the signal processor is used for receiving the signals of the sensors and displaying the processed detection values; the detection points are equidistantly arranged on both sides of the valve, the second detection point and the third detection point are used for detecting valve internal leakage, and the first detection point and the fourth detection point are used for excluding the influence of upstream and downstream sound sources. The severity of valve internal leakage is judged by reading the sound values of the four detection points, and the influence of upstream and downstream valve internal leakage is excluded, which has the advantages of convenient detection, low cost and high accuracy.

[0004] However, the above technical scheme is generally fixed on the inlet pipe and the outlet pipe, but if the sensor is damaged after a long time of use, it will be difficult for the worker to measure the internal leakage of the valve in time, and the disassembly and replacement of the sensor also become a big problem for the worker to operate, and if the sensor is not replaced in time, the valve internal leakage detection work will be interrupted, so a sensor with a convenient disassembly structure is particularly important. Utility model content

[0005] The utility model discloses a valve internal leakage detection device of thermal power plant, to solve the problem that the sensor is damaged if not replaced in time, which makes the valve internal leakage detection work difficult to proceed smoothly.

[0006] To achieve the above object, the utility model provides the following technical scheme: a valve internal leakage detection device of thermal power plant, including inlet pipe, the one end of inlet pipe is provided with outlet pipe, the lower portion of outlet pipe is provided with positioning board, the inside fixed connection of positioning board has four positioning blocks, the inside of positioning board is provided with four round holes, the inside screw thread connection of positioning block has fastening screw, and the surface screw thread of fastening screw is penetrated in the inside of round hole, the inside penetration of round hole has sensor, the surface of inlet pipe one side is provided with two first detection port, and the surface of outlet pipe one side is provided with two second detection port with the position corresponding on inlet pipe.

[0007] Preferably, the surface of the inlet pipe one side is provided with two first threads, the surface of the first thread is screw connected with the first positioning ring, the surface of the outlet pipe one side is provided with two second threads, the surface of the second thread is screw connected with the second positioning ring, the inside of the second positioning ring is provided with a connecting hole, and the inner side wall of the connecting hole is fixedly connected with a sealing strip.

[0008] Preferably, the top of the sensor is fixedly connected with a detection head, and the surface of the detection head penetrates the inside of the first detection port and the connecting hole.

[0009] Preferably, the other side of the inlet pipe surface is connected with a first fixed clamp, and the bottom of the first fixed clamp is connected with a second fixed clamp.

[0010] Preferably, the inside of the first fixed clamp is screw connected with two fastening bolts, and the surface of the fastening bolt is screw penetrated in the inside of the second fixed clamp.

[0011] Preferably, the end of the inlet pipe away from the first fixed clamp is connected with a valve, and the inside of the valve is connected with the end of the outlet pipe close to the second positioning ring.

[0012] Preferably, the inside of the sensor is threadedly connected with a signal transmission head, the bottom end of the signal transmission head is fixedly connected with a data line, and the bottom end of the data line is fixedly connected with a signal processor.

[0013] Preferably, the top of the first fixing clamp is fixedly connected with a connecting rod, and both ends of the connecting rod are fixedly connected with the inside of the first fixing clamp.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] (1) the valve internal leakage detection work in the pipeline in the thermal power plant can be smoothly carried out, the life safety of the staff can be guaranteed to a certain extent, the installation and dismounting work of the sensor are relatively convenient, if the sensor is damaged, the staff can be conveniently replaced in time, and when the valve internal leakage is detected, multiple measuring points are distributed, and the accuracy during measurement is further ensured.

[0016] (2) the detection head is inserted into the inside of the first detection port and the second detection port, at the same time, the surface thereof is in contact with the sealing strip, the sealing property of the detection head inserted into the inside of the inlet pipeline and the outlet pipeline is guaranteed, and certain deviation caused by leakage during detection of multiple detection ports is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 it is the perspective view of the utility model;

[0018] Figure 2 it is the perspective view of the detection head of the utility model;

[0019] Figure 3 it is the perspective view of the first positioning ring of the utility model;

[0020] Figure 4 it is the perspective view of the first detection port of the utility model;

[0021] Figure 5 it is the plan view of the positioning plate of the utility model;

[0022] In the drawing: 1, inlet pipeline; 2, outlet pipeline; 3, positioning plate; 4, positioning block; 5, round hole; 6, fastening screw; 7, sensor; 8, first detection port; 9, first fixing clamp; 10, second fixing clamp; 11, valve; 12, connecting rod; 13, signal transmission head; 14, data line; 15, signal processor; 16, first positioning ring; 17, second positioning ring; 18, sealing strip; 19, detection head. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Embodiment one:

[0025] Please refer to Figures 1 to 5 As shown in FIG. 1, a kind of valve inner leakage detection device of thermal power plant, including inlet pipeline 1, one end of inlet pipeline 1 is provided with outlet pipeline 2, outlet pipeline 2 below is provided with positioning plate 3, four positioning blocks 4 are fixedly connected in the inside of positioning plate 3, four round holes 5 are opened in the inside of positioning plate 3, fastening screw 6 is screw-connected in the inside of positioning block 4, and the surface of fastening screw 6 is screw-penetrated in the inside of round hole 5, sensor 7 is penetrated in the inside of round hole 5, two first detection ports 8 are opened in the surface of one side of inlet pipeline 1, and two second detection ports corresponding to the position on inlet pipeline 1 are opened in the surface of one side of outlet pipeline 2.Working personnel twists fastening screw 6, fastening screw 6 one end will sensor 7 be fixed in the inside of round hole 5 at this time, it needs to be explained that sensor 7 is acoustic emission sensor, the structure above inlet pipeline 1 and outlet pipeline 2 is same, it is the design of mutual symmetry, first detection port 8 and second detection port are located in the surface of one side of inlet pipeline 1 and outlet pipeline 2 respectively, corresponding to each other.

[0026] The top of sensor 7 is fixedly connected with detection head 19, and the surface of detection head 19 is penetrated into the inside of first detection port 8 and connecting hole.Working personnel uses sensor 7 to detect when sensor 7 is placed in the inside of round hole 5 and fixed, pre-insert detection head 19 into the inside of first detection port 8 and second detection port, to facilitate subsequent sensor 7 to detect the liquid or gas in the inside of inlet pipeline 1 and outlet pipeline 2.

[0027] The other side of the surface of inlet pipeline 1 is connected with first fixed clamp 9, and the bottom of first fixed clamp 9 is connected with second fixed clamp 10.

[0028] Two fastening bolts are screw-connected in the inside of first fixed clamp 9, and the surface of fastening bolt is screw-penetrated in the inside of second fixed clamp 10.Through the setting of first fixed clamp 9, second fixed clamp 10 and fastening bolt, the whole device can be connected with inlet pipeline 1 and outlet pipeline 2, ensure the stability of other equipment, and the top of positioning plate 3 is fixedly connected with the surface of second fixed clamp 10.

[0029] The valve 11 is connected to the end of the inlet pipe 1 away from the first fixed clamp 9, and the inside of the valve 11 is connected to the end of the outlet pipe 2 close to the second positioning ring 17. The valve 11 connects the inlet pipe 1 and the outlet pipe 2, and the valve 11 in the middle plays an opening and closing role for the gas or liquid flowing in the inlet pipe 1 and the outlet pipe 2.

[0030] The signal transmission head 13 is screwed into the inside of the sensor 7, and the bottom end of the signal transmission head 13 is fixedly connected to the data line 14.

[0031] The data line 14 is fixedly connected to the signal processor 15 at the bottom end, the top of the first fixed clamp 9 is fixedly connected to the connecting rod 12, and the two ends of the connecting rod 12 are fixedly connected to the inside of the first fixed clamp 9. The signal transmission head 13 transmits the signal to the inside of the signal processor 15 through the data line 14, and the signal processor 15 is an acoustic emission detector. Through the arrangement of the connecting rod 12, the two first fixed clamps 9 can be connected together. When one of the first fixed clamps 9 and the second fixed clamp 10 are connected by the fastening bolt, the connection of the other first fixed clamp 9 and the second fixed clamp 10 will be more convenient.

[0032] Embodiment two:

[0033] Please refer to Figure 3 and Figure 4 As shown, two first threads are formed on one side of the surface of the inlet pipe 1, the surface of the first thread is screw-connected with the first positioning ring 16, two second threads are formed on one side of the surface of the outlet pipe 2, the surface of the second thread is screw-connected with the second positioning ring 17, the inside of the second positioning ring 17 is provided with a connecting hole, and the inner side wall of the connecting hole is fixedly connected with the sealing strip 18. Through the formation of the first thread and the second thread, the connection of the first positioning ring 16 and the second positioning ring 17 with the inlet pipe 1 and the outlet pipe 2 is facilitated, the internal structures of the first positioning ring 16 and the second positioning ring 17 are the same, and the connecting hole is formed therein, which facilitates the installation and fixation of the sealing strip 18. Through the arrangement of the sealing strip 18, the sealing property of the detection head 19 is improved when it is inserted into the first detection port 8 and the second detection port. The surface of the inlet pipe 1 is provided with two first positioning rings 16, the surface of the outlet pipe 2 is provided with two second positioning rings 17, and from left to right, they are respectively set as the first detection port 8, the second detection port, the third detection port and the fourth detection port. The positions of the sensors 7 also correspond to them one by one.

[0034] The utility model discloses a working principle: the staff pre -screws first positioning ring 16 and second positioning ring 17 on the surface of import pipeline 1 and export pipeline 2, complete, the connecting hole in first positioning ring 16 and second positioning ring 17 inside correspond with the position of first detection mouth 8 and second detection mouth, and the staff subsequently pre -place one first fixed clip 9 on the other side of import pipeline 1 surface, while the inner side wall of another first fixed clip 9 is pasted with the other side of export pipeline 2 surface, at this time, the staff again pastes the inner side wall of two second fixed clips 10 with the other side of import pipeline 1 and export pipeline 2 surface respectively, and then the staff screws up the fastening bolt, finally makes first fixed clip 9, second fixed clip 10 and positioning plate 3 connect with import pipeline 1 and export pipeline 2 successfully, and then the staff again puts sensor 7 into the round hole 5 in the inside of positioning plate 3 respectively, and simultaneously, the sensor 7 is lifted upwards, and then makes detection head 19 insert into the inside of first detection mouth 8 and second detection mouth, and then the staff screws up the fastening screw 6, at this time, the sensor 7 is fixed, and after detection head 19 inserts into the inside of first detection mouth 8 and second detection mouth, it is convenient to detect the internal leakage of valve 11, if the sound value is bigger from left to right in the second first detection mouth 8 and third second detection mouth, and the sound value is smaller from left to right in the first first detection mouth 8 and fourth second detection mouth, at this time, valve 11 has internal leakage, if the sound value is bigger from left to right in the first first detection mouth 8, and is smaller from left to right, at this time, valve 11 does not have internal leakage, and the sound comes from upstream, if the sound value is smaller from left to right in the left first detection mouth 8, the right first detection mouth 8 and export pipeline 2 left second detection mouth, and the sound value is bigger in export pipeline 2 right second detection mouth, at this time, valve 11 also does not have internal leakage, and the sound comes from downstream, and the data detected is transported to the inside of data line 14 through signal transmission head 13, and finally enters signal processor 15 inside and is handled and analyzed, if sensor 7 is damaged, the staff closes valve 11, and the staff can timely screw out fastening screw 6 and then replace new sensor 7, and the staff operation is simple, convenient, guarantees the smooth performance of sensor 7 to valve 11 internal leakage detection work.

[0035] Although the embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A device for detecting internal leakage of a valve in a thermal power plant, characterized in that, Include: The inlet pipe (1), one end of the inlet pipe (1) is provided with an outlet pipe (2), the lower part of the outlet pipe (2) is provided with a positioning plate (3), the inside of the positioning plate (3) is fixedly connected with four positioning blocks (4), four circular holes (5) are opened in the inside of the positioning plate (3), the inside of the positioning block (4) is threadedly connected with a fastening screw (6), and the surface of the fastening screw (6) is threadedly penetrated into the inside of the circular hole (5), the inside of the circular hole (5) is penetrated with a sensor (7), two first detection openings (8) are opened on one side of the surface of the inlet pipe (1), and two second detection openings corresponding to the positions on the inlet pipe (1) are opened on one side of the surface of the outlet pipe (2).

2. A device for detecting internal leakage of a valve of a thermal power plant according to claim 1, characterized in that: The surface of the first screw thread is threadedly connected with a first positioning ring (16), the surface of the second screw thread is threadedly connected with a second positioning ring (17), the inside of the second positioning ring (17) is provided with a connecting hole, and the inner side wall of the connecting hole is fixedly connected with a sealing strip (18).

3. A device for detecting internal leakage of a valve of a thermal power plant according to claim 1, characterized in that: The top end of the sensor (7) is fixedly connected with a detection head (19), and the surface of the detection head (19) penetrates into the inside of the first detection opening (8) and the connecting hole.

4. A device for detecting internal leakage of a valve of a thermal power plant according to claim 1, characterized in that: The other side of the surface of the inlet pipe (1) is connected with a first fixed clamp (9), and the bottom of the first fixed clamp (9) is connected with a second fixed clamp (10).

5. A device for detecting internal leakage of a valve of a thermal power plant according to claim 4, characterized in that: The inside of the first fixed clamp (9) is threadedly connected with two fastening bolts, and the surface of the fastening bolt is threadedly penetrated into the inside of the second fixed clamp (10).

6. A device for detecting internal leakage of a valve of a thermal power plant according to claim 1, characterized in that: The end of the inlet pipe (1) away from the first fixed clamp (9) is connected with a valve (11), and the inside of the valve (11) is connected with one end of the outlet pipe (2) close to the second positioning ring (17).

7. A device for detecting internal leakage of a valve of a thermal power plant according to claim 1, characterized in that: The inside of the sensor (7) is threadedly connected with a signal transmission head (13).

8. A device for detecting internal leakage of a valve of a thermal power plant according to claim 7, characterized in that: The bottom end of the signal transmission head (13) is fixedly connected with a data line (14).

9. A device for detecting internal leakage of a valve of a thermal power plant according to claim 8, characterized in that: The bottom end of the data line (14) is fixedly connected with a signal processor (15).

10. A device for detecting internal leakage of a valve of a thermal power plant according to claim 4, characterized in that: The top of the first fixed clamp (9) is fixedly connected with a connecting rod (12), and both ends of the connecting rod (12) are fixedly connected with the inside of the first fixed clamp (9).

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