Steam sampling tube machine for alloy steel pipe of thermal power plant

Abstract

The application provides a steam sampling tube machine for alloy steel pipeline of thermal power plant, which comprises an alloy steel pipeline, a sampling cylinder is fixedly connected to the top of the alloy steel pipeline, a piston disc is arranged at the end of an extensible threaded rod in the sampling cylinder and extends into the alloy steel pipeline, and the shape of the piston disc is matched with the communicating port of the alloy steel pipeline and the sampling cylinder. The application can easily and simply carry out sampling, and the sampling tube is simple, fast and convenient to assemble and disassemble, so that the service life of the device is well ensured, the safety hidden danger during sampling is reduced, the working efficiency is improved, the sampling precision is improved, and the accuracy of data is ensured.

Description

Technical Field

[0001] This invention relates to a steam sampling tube machine for alloy steel pipelines in thermal power plants. Background Technology

[0002] In order to accurately reflect the quality of steam during the operation of thermal power plant units, prevent damage to equipment caused by insufficient steam purity, and ensure that the working fluid meets the design requirements, it is necessary to design and install several steam sampling devices on the alloy steel pipelines of thermal power plants to monitor the status of the working fluid in real time and ensure the safe operation of the units.

[0003] However, existing steam sampling devices have some drawbacks. First, the sampling device needs to be opened during sampling. Due to the high internal pressure of the pipes, gaps may easily form at the welded joints of the sampling device during collection. In addition, most existing depressurization processes use cooling depressurization or diversion depressurization, which can easily affect the detection effect and cause inaccurate data. Therefore, a sampling device with strong robustness and stable depressurization effect is needed. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a steam sampling tube machine for alloy steel pipelines in thermal power plants. This steam sampling tube machine for alloy steel pipelines in thermal power plants can easily and simply perform sampling. The sampling tube is easy and quick to load and unload, and the operation is simple and convenient, thereby ensuring the service life of the device and reducing safety hazards during sampling.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a steam sampling tube machine for alloy steel pipes in thermal power plants, comprising an alloy steel pipe, a sampling tube fixedly connected to the top of the alloy steel pipe, a piston disc in the sampling tube being mounted on the end of a retractable threaded rod and extending into the alloy steel pipe, the shape of the piston disc matching the connection port between the alloy steel pipe and the sampling tube.

[0007] The sampling cylinder is fixed to the alloy steel pipe by arc-shaped connecting blocks and U-shaped pressure blocks; the inner arc walls of the two arc-shaped connecting blocks are attached to the outer wall of the alloy steel pipe, and the outer walls of the sampling cylinder are pressed together by U-shaped pressure blocks on both sides. The U-shaped pressure blocks are attached to and fixed to the alloy steel pipe by arc-shaped sealing gaskets. An arc-shaped pressure groove is opened on the side of the U-shaped pressure block relative to the sampling cylinder, and the arc-shaped connecting blocks are embedded in the arc-shaped pressure groove.

[0008] The sampling cylinder contains a first piston block and a second piston block. The second piston block is located near the connection port between the alloy steel pipe and the sampling cylinder. An exhaust pipe is located between the first piston block and the second piston block and is opened on the side wall of the sampling cylinder. A limit ring is located on the inner wall of the sampling cylinder near the lower edge of the exhaust pipe to limit the movement of the second piston block.

[0009] The first piston block is fixed inside the outer end of the sampling cylinder, and the second piston block is threadedly connected to a threaded rod; a T-shaped rotating rod is externally connected to the upper end of the threaded rod; a blocking ring is sleeved on the threaded rod at the top surface position of the first piston block.

[0010] A through hole is vertically arranged on the first piston block, and a vent pipe is connected and fixed to the bottom surface of the second piston block at the lower end of the through hole; a T-shaped piston rod passes through the through hole and is arranged in the vent pipe.

[0011] A three-way pipe is connected to the sampling pipe at the top of the sampling cylinder, and the end of the three-way pipe connected to the sampling cylinder is fixed to the first piston block at the inner top of the sampling cylinder.

[0012] A tapered ring is arranged on the inner wall of the end of the three-way pipe connected to the sampling pipe; the end of the three-way pipe is fixed to the sampling pipe through an inner threaded sleeve and an outer threaded sleeve; a tapered rubber ring is arranged at the position where the sampling pipe and the three-way pipe are connected for sealing; a handle is arranged at the outer end of the outer threaded sleeve.

[0013] An arc-shaped clamping block is arranged at the bottom of the alloy steel pipe, and the arc-shaped clamping block is fixed to the upper end of a compression screw rod; the compression screw rod passes through a connecting plate; a limiting sleeve is arranged at a position higher than the connecting plate between the arc-shaped clamping block and the compression screw rod.

[0014] The present application has the advantages that sampling can be easily and simply performed, the sampling pipe can be easily and quickly assembled and disassembled, and the device has a long service life, low safety risk during sampling, high work efficiency, high sampling precision, and high data accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of at least one embodiment of the present application;

[0016] Figure 2 is a side view of Figure 1 ;

[0017] Figure 3 is an enlarged schematic view of A in Figure 1 ;

[0018] Figure 4 is an enlarged schematic view of B in Figure 1 ;

[0019] In the figure: 1-alloy steel pipeline, 2-sampling cylinder, 3-arc-shaped connecting block, 4-U-shaped pressing block, 5-arc-shaped sealing gasket, 6-connecting block, 7-L-shaped pressing block, 8-connecting plate, 9-pressing screw, 10-arc-shaped clamping block, 11-limiting sleeve, 12-rotating block, 13-three-way pipe, 14-T-shaped rotating rod, 15-sealing sleeve, 16-sealing ring, 17-tapered ring, 18-sampling pipe, 19-inner threaded sleeve, 20-outer threaded sleeve, 21-tapered rubber ring, 22-handle, 23-stop ring, 24-T-shaped piston rod, 25-threaded rod, 26-piston disc, 27-exhaust pipe, 28-first piston block, 29-second piston block, 30-limiting ring, 31-through hole, 32-ventilation pipe, 33-first threaded sleeve, 34-second threaded sleeve, 35-clasping ring, 36-arc-shaped pressing groove. DETAILED DESCRIPTION

[0020] The technical solutions of the present application are further described below, but the scope of protection is not limited to the description.

[0021] Example 1

[0022] As Figures 1 to 4 shown in a steam sampling pipe machine for alloy steel pipelines of thermal power plants, including alloy steel pipeline 1, the top of which is fixedly connected with sampling cylinder 2, sampling cylinder 2 has piston disc 26 mounted at the end of telescopic threaded rod 25 and extending into alloy steel pipeline 1, and the shape of piston disc 26 matches the connecting port of alloy steel pipeline 1 and sampling cylinder 2.

[0023] Example 2

[0024] Based on example 1, sampling cylinder 2 is fixed to alloy steel pipeline 1 through arc-shaped connecting block 3 and U-shaped pressing block 4; the inner arc wall of two arc-shaped connecting blocks 3 is attached to the outer wall of alloy steel pipeline 1, the outer wall of sampling cylinder 2 is tightly pressed by U-shaped pressing block 4, U-shaped pressing block 4 is fixedly attached to alloy steel pipeline 1 through arc-shaped sealing gasket 5, arc-shaped pressing groove 36 is opened on the side of U-shaped pressing block 4 relative to sampling cylinder 2, and arc-shaped connecting block 3 is embedded in arc-shaped pressing groove 36.

[0025] Example 3

[0026] Based on example 1, first piston block 28 and second piston block 29 are arranged in sampling cylinder 2, second piston block 29 is close to the connecting port of alloy steel pipeline 1 and sampling cylinder 2, and exhaust pipe 27 is opened on the side wall of sampling cylinder 2 between first piston block 28 and second piston block 29; limiting ring 30 is arranged on the inner wall of sampling cylinder 2 close to the lower edge of exhaust pipe 27 for limiting second piston block 29.

[0027] Example 4

[0028] Based on the embodiment 3, the first piston block 28 is fixed inside the outer end of the sampling cylinder 2, and the second piston block 29 is screwed to the threaded rod 25; the threaded rod 25 is externally connected with the T-shaped rotating rod 14 at the upper end; the blocking ring 23 is sleeved on the threaded rod 25 at the top surface of the first piston block 28.

[0029] Embodiment 5

[0030] Based on the embodiment 1, the vertical through hole 31 is arranged on the first piston block 28, and the air pipe 32 is connected and fixed to the bottom surface of the second piston block 29 at the lower end of the through hole 31; the T-shaped piston rod 24 passes through the through hole 31 and is placed in the air pipe 32.

[0031] Embodiment 6

[0032] Based on the embodiment 1, the three-way pipe 13 is connected to the sampling pipe 18 at the top of the sampling cylinder 2, and the end of the three-way pipe 13 connected to the sampling cylinder 2 is fixed to the first piston block 28 at the inner top of the sampling cylinder 2.

[0033] Embodiment 7

[0034] Based on the embodiment 6, the conical ring 17 is arranged on the inner wall of the end of the three-way pipe 13 connected to the sampling pipe 18; the sampling pipe 18 is fixed by the inner threaded sleeve 19 and the outer threaded sleeve 20 at the end of the three-way pipe 13; the conical rubber ring 21 is arranged at the position where the sampling pipe 18 and the three-way pipe 13 are connected; the handle 22 is arranged at the outer end of the outer threaded sleeve 20.

[0035] Embodiment 8

[0036] Based on the embodiment 1, the arc-shaped clamping block 10 is arranged at the bottom of the alloy steel pipe 1, the arc-shaped clamping block 10 is fixed to the upper end of the compression screw rod 9, the compression screw rod 9 passes through the connecting plate 8, and the limiting sleeve 11 is arranged at the position between the arc-shaped clamping block 10 and the compression screw rod 9 which is higher than the connecting plate 8.

[0037] Embodiment 9

[0038] Based on the above embodiment, including alloy steel pipeline 1, alloy steel pipeline 1 top fixedly connected with sampling cylinder 2, sampling cylinder 2 with alloy steel pipeline 1, sampling cylinder 2 outer wall both sides bottom fixedly connected with two arc-shaped connecting blocks 3, two arc-shaped connecting blocks 3 inner arc wall respectively with alloy steel pipeline 1 outer wall set, sampling cylinder 2 outer wall both sides respectively provided with two U-shaped pressing blocks 4, two U-shaped pressing blocks 4 inner top surface one side respectively symmetrically provided with two arc-shaped pressing grooves 36, two U-shaped pressing blocks 4 inner top surface respectively fixedly connected with two arc-shaped sealing pads 5, two arc-shaped sealing pads 5 inner arc wall respectively with alloy steel pipeline 1 outer wall set, two arc-shaped connecting blocks 3 respectively embedded two arc-shaped pressing grooves 36 and closely set with it, two U-shaped pressing blocks 4 both sides bottom respectively symmetrically fixedly connected with four connecting blocks 6, every U-shaped pressing block 4 both sides fixedly connected two connecting blocks 6 top respectively closely set with two L-shaped pressing blocks 7, two L-shaped pressing blocks 7 bottom fixedly connected with connecting plate 8, connecting plate 8 on screw joint has pressing screw 9, two connecting plate 8 directly above all provided with two arc-shaped clamping blocks 10, two arc-shaped clamping blocks 10 inner arc wall respectively with alloy steel pipeline 1 outer wall set, two arc-shaped clamping blocks 10 bottom respectively fixedly connected with two limiting sleeves 11, two limiting sleeves 11 respectively rotatably connected with two rotating blocks 12, two pressing screws 9 top respectively extend into two limiting sleeves 11 with two rotating blocks 12 bottom fixedly connected, sampling cylinder 2 top fixedly connected with three-way pipe 13, three-way pipe 13 top central place inserts rotatably with T-shaped rotating rod 14, T-shaped rotating rod 14 on closely with rotatably with sealing sleeve 15, three-way pipe 13 top with T-shaped rotating rod 14 connection place fixedly installed with sealing ring 16, sealing ring 16 fixedly installed on three-way pipe 13, sealing sleeve 15 bottom fixedly connected with three-way pipe 13 top, three-way pipe 13 in two sides pipe inner bottom respectively fixedly connected with multiple tapered rings 17, three-way pipe 13 in two sides pipe bottom respectively fixedly connected with multiple internal thread sleeves 19, multiple internal thread sleeves 19 respectively screwed with multiple external thread sleeves 20, multiple external thread sleeves 20 outer wall respectively fixedly installed with handle 22, three-way pipe 13 in two sides pipe bottom respectively fixedly connected with multiple tapered rubber rings 21, multiple tapered rubber rings 21 respectively set in corresponding multiple internal thread sleeves 19, multiple tapered rubber rings 21 respectively closely set with multiple sampling tubes 18, multiple sampling tubes 18 top opening respectively extend into three-way pipe 13 in two sides pipe and with its sliding connection, every sampling tube 18 top all with every tapered ring 17 bottom closely set, T-shaped rotating rod 14 bottom extends into three-way pipe 13, T-shaped rotating rod 14 on fixedly installed with stop ring 23, stop ring 23 sets in three-way pipe 13, three-way pipe 13 inner top surface fixedly installed with multiple T-shaped piston rods 24, T-shaped rotating rod 14 bottom fixedly connected with threaded rod 25, T-shaped rotating rod 14 bottom passes out sampling cylinder 2 and extends into alloy steel pipeline 1, alloy steel pipeline 1 in sets up piston disc 26,The piston disc 26 is a conical disc with both top and bottom ends. The bottom end of the threaded rod 25 is fixedly connected to the top end of the piston disc 26. Two exhaust pipes 27 are symmetrically fixedly connected to both sides of the sampling cylinder 2, and the two exhaust pipes 27 are respectively connected to the sampling cylinder 2. A first piston block 28 and a second piston block 29 are respectively fitted inside the sampling cylinder 2. The outer wall of the first piston block 28 is fixedly connected to the inner wall of the sampling cylinder 2. A second threaded sleeve 34 is fixedly embedded in the center of the first piston block 28. The second threaded sleeve 34 is screwed to the threaded rod 25. Multiple through holes 31 are uniformly fixedly arranged in a ring on the first piston block 28. Multiple T-shaped piston rods 24 pass through the multiple through holes respectively. A limiting ring 30 is fixedly installed on the inner wall of the sampling cylinder 2, and the limiting ring 30 is located between the exhaust pipe 27 and the second piston block 29. Multiple vent pipes 32 are evenly embedded in the second piston block 29. The bottom ends of multiple T-shaped piston rods 24 extend into the multiple vent pipes 32 and are slidably connected to them. The piston block at the bottom of the T-shaped piston rod 24 is slidably connected to the inner wall of the vent pipe 32. A first threaded sleeve 33 is rotatably connected and embedded in the second piston block 29. Two retaining rings 35 are fixedly fitted onto the outer walls of the top and bottom ends of the first threaded sleeve 33, and are respectively embedded in the second piston block 29 and rotatably connected to it.

[0039] The alloy steel pipe 1 and the sampling cylinder 2 are fixedly connected by welding.

[0040] The vent pipe 32 is made of alloy steel.

[0041] The diameter of the through hole 31 is the same as the maximum outer diameter of the vent pipe 32.

[0042] The diameter of through hole 31 is 4-5 mm larger than the diameter of T-type piston rod 24.

[0043] Working principle: When this device is needed, first place it in the work area and then install it. During installation, first weld the sampling cylinder 2 to the alloy steel pipe 1, then align the two arc-shaped pressure grooves 36 on the inner top surface of the two U-shaped pressure blocks 4 with the two arc-shaped connecting blocks 3 and press them in place. At this time, press the two sets of L-shaped pressure blocks 7 onto the connecting blocks 6 on both sides of the U-shaped pressure blocks 4. Then rotate the clamping screws 9 on the two connecting plates 8 so that the two arc-shaped clamping blocks 10 and the U-shaped pressure blocks 4 clamp the alloy steel pipe 1. This further ensures the stability of the sampling cylinder 2 and enables it to work well.

[0044] When it carries out the sampling work, the flowing steam is gathered at the place where the alloy steel pipeline 1 and the sampling cylinder 2 are communicated, at this time, the T-shaped rotating rod 14 is rotated, so that the T-shaped rotating rod 14 rotates and drives the threaded rod 25 to rotate, at this time, because the threaded rod 25 is screwed with the second threaded sleeve 34 on the first piston block 28, the threaded rod 25 moves upwards, at the same time, the threaded rod 25 is screwed with the first threaded sleeve 33 on the second piston block 29, so that the piston disc 26 moves upwards synchronously with the second piston block 29, so that when the piston disc 26 enters the sampling cylinder 2, the piston disc 26 and the piston disc 26 form a sealed space, at this time, the pressure of the sealed space is a single pressure, with the second piston block 29 and the piston disc 26 keeping synchronous rising, the second piston block 29 contacts the limiting ring 30 and stops rising, stays at the position below the limiting ring 30, so that the plurality of piston rods 24 is fixed, and the plurality of air pipes 32 rises with the rising of the second piston block 29, so that the bottom end of the plurality of piston rods 24 penetrates through the plurality of air pipes 32, so that the air pipe 32 lacks plugging and communicates with the tee pipe 13, so that the gas can enter the tee pipe 13 smoothly, so as to complete the position conversion of the gas, and the pressure in the sealed space is reduced on one hand, that is, the gas in the tee pipe 13 and the pressure in the sealed space are the same, at this time, a part of steam is still reserved in the sealed space, with the further rotation of the T-shaped rotating rod 14, the first threaded sleeve 33 is rotatably connected with the second piston block 29 through the two clamping rings 35, so that the piston disc 26 continues to move upwards, so as to form a piston extrusion movement, so that the gas can fully enter the tee pipe 13, so as to complete the collection work, at this time, the gas enters the plurality of sampling pipes 18, the rotation of the outer threaded sleeve 20 can loosen the clamping of the conical rubber ring 21 on the sampling pipe 18, so that the sampling pipe 18 can be easily taken off, so as to complete the pressure reduction and collection work, so as to well guarantee the service life of the device and reduce the safety hazard in sampling, the operation is simple and convenient, the work efficiency is improved and the sampling precision is improved, the accuracy of data is guaranteed.

[0045] Therefore, the present application can easily and simply carry out sampling, the rotation of the outer threaded sleeve can loosen the clamping of the conical rubber ring on the sampling pipe, so that the sampling pipe can be easily taken off, so as to complete the pressure reduction and collection work, so as to well guarantee the service life of the device and reduce the safety hazard in sampling, the operation is simple and convenient, the work efficiency is improved and the sampling precision is improved, the accuracy of data is guaranteed.

Claims

1. A steam sampling tube machine for alloy steel pipes of thermal power plants, comprising an alloy steel pipe (1), characterized by: The alloy steel pipeline (1) top fixed communication has sampling cylinder (2), sampling cylinder (2) has piston disc (26) in the telescopic threaded rod (25) end and extends to alloy steel pipeline (1), the shape of piston disc (26) matches with the communication port of alloy steel pipeline (1) and sampling cylinder (2); The sampling cylinder (2) is fixed to the alloy steel pipeline (1) through the arc connecting block (3) and the U-shaped pressing block (4). The inner arc wall of the two arc connecting blocks (3) is attached to the outer wall of the alloy steel pipeline (1), and the outer wall of the sampling cylinder (2) is tightly pressed by the U-shaped pressing block (4) on both sides. The U-shaped pressing block (4) is attached and fixed to the alloy steel pipeline (1) through the arc-shaped sealing gasket (5). An arc-shaped pressing groove (36) is opened on the side of the U-shaped pressing block (4) relative to the sampling cylinder (2), and the arc-shaped connecting block (3) is embedded in the arc-shaped pressing groove (36). The sampling cylinder (2) has a first piston block (28) and a second piston block (29). The second piston block (29) is close to the communication port of the alloy steel pipeline (1) and the sampling cylinder (2). An exhaust pipe (27) is opened on the side wall of the sampling cylinder (2) between the first piston block (28) and the second piston block (29). A limiting ring (30) is arranged on the inner wall of the sampling cylinder (2) close to the lower edge of the exhaust pipe (27) to limit the second piston block (29). A through hole (31) is vertically arranged on the first piston block (28), and a gas pipe (32) is connected and fixed to the bottom surface of the second piston block (29) at the lower end of the through hole (31). A T-shaped piston rod (24) passes through the through hole (31) and is placed in the gas pipe (32). A three-way pipe (13) is connected to the sampling pipe (18) at the top of the sampling cylinder (2). The end of the three-way pipe (13) connected to the sampling cylinder (2) is fixed to the first piston block (28) at the top inside of the sampling cylinder (2). A tapered ring (17) is arranged on the inner wall of the end of the three-way pipe (13) connected to the sampling pipe (18). The end of the three-way pipe (13) is fixed to the sampling pipe (18) through an inner threaded sleeve (19) and an outer threaded sleeve (20). A tapered rubber ring (21) is arranged at the connection position of the sampling pipe (18) and the three-way pipe (13) to seal. A handle (22) is arranged at the outer end of the outer threaded sleeve (20). An arc-shaped clamping block (10) is arranged at the bottom of the alloy steel pipeline (1). The arc-shaped clamping block (10) is fixed to the upper end of a pressing screw (9). The pressing screw (9) passes through a connecting plate (8). A limiting sleeve (11) is arranged at a position higher than the connecting plate (8) between the arc-shaped clamping block (10) and the pressing screw (9).

2. The steam sampling tube machine for power plant alloy steel piping as claimed in claim 1, wherein: The first piston block (28) is fixed to the outer end of the sampling cylinder (2), and the second piston block (29) is threadedly connected to the threaded rod (25). A T-shaped rotating rod (14) is arranged at the outer end of the threaded rod (25). A stop ring (23) is arranged on the top surface of the first piston block (28) and is sleeved on the threaded rod (25).

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