CN104062116A - Method and system for testing stress on valve inside anti-blocking jet flow tube cleaner - Google Patents

Abstract

A method and system for testing the internal valve stress of an anti-jamming jet pig, including hollowing out three grooves on the back end support plate of the anti-jamming jet pig for installing miniature force sensors; Length, process sleeve elements of different lengths so that the sleeve can be installed in the valve stem; process thin gaskets so that the gasket can be installed in the valve stem, and its outer diameter is larger than the force point of the miniature load cell; Install the miniature load cell in the 3 hollow grooves, and output the collection line to the instrument and computer data acquisition system; install the thin gasket and sleeve so that the thin gasket is just in contact with the miniature dynamometer, and adjust the gas flow To the pipeline flow rate, use the data acquisition system and the sensor's own instrument to obtain the airflow impact force. The valve force testing method of the invention has wide applicability, and can carry out force test research on valves of jet pipe pigs used with different pipe diameters.

Description

A method and system for testing the force of an internal valve of an anti-jamming jet pig

technical field

The invention relates to the field of pig manufacturing, and more specifically relates to a method and system for testing the force of an internal valve of an anti-jamming jet pig.

Background technique

In the field of pig manufacturing, there are no internal components for traditional pigs, that is, there is no problem of stress testing internal components, but traditional pigs use a cup or ball seal to increase the back pressure, and then Rely on the pressure difference between front and back to push its movement to carry out pigging. Due to the front and rear seals, the pigging speed is equivalent to the airflow speed, resulting in excessive pigging speed, resulting in serious leakage in the upstream and downstream of the pigging device, and reducing the pigging efficiency; The moving pigs drive mechanical impurities to produce strong friction with the inner wall of the pipeline, destroying the coating and shortening the life of the pipeline; a large amount of liquid accumulates downstream of the pig, which makes its running speed and pressure change drastically, especially when passing through the undulating pipeline, resulting in The operation of the system is extremely unstable; especially for the pigging of large-diameter pipelines, tons of pigs run at high speed in the pipeline, generating huge momentum and causing huge The impact of the impact may damage the equipment, the pig, and even cause the pipeline to leak, causing an accident; when the pig reaches the end of the pipeline, it will quickly transport a large amount of fluid in the entire pipeline to the slug catcher In the collector, the flow rate of the liquid plug is extremely large, which can easily cause an overload accident of the collector and affect normal production. On this basis, the anti-jamming jet pig was designed and developed (Chinese utility model patent 201320602776.1). The existence of internal components can not only achieve a certain bypass, effectively solve the above problems, but also can prevent the pig from being blocked. It is moved by the valve to block the gas flow path and realize the pressure-suppressed restart of the pig. The realization of the anti-jamming function lies in the use of the key element of the spring, so it is necessary to study the force of the valve, which has not been solved in the prior art.

Contents of the invention

The purpose of the present invention is to provide a method and system for testing the force of the internal valve of the anti-jamming jet pig, which can test and study the spring force of the key internal components of the anti-jamming jet pig to overcome the current situation. There are technical deficiencies.

The anti-jamming jet pig is stuck in the gas pipeline due to certain resistance, the gas in the pipeline can be blown from the rear end of the pig to the front of the pig through the bypass hole, the gas will be blocked by the valve baffle, and the gas will A certain gas impact force is generated on the valve baffle, and the difference in gas flow rate and the different area of the valve baffle will have a certain impact on the size of the impact force. The compression force of the spring. And in the valve airflow impact test process, we need to minimize the impact of the miniature load cell on the gas flow channel inside the pig, and improve the accuracy of the airflow impact test.

In view of the above characteristics, an anti-jamming jet pig internal valve force test method of the present application is characterized in that it includes the following steps:

(1) Process 3 grooves on the three ribs of the back end support plate of the anti-jamming jet pig to be tested. The 3 grooves are processed from the tail of the pig to the head, and the 3 grooves are The slot is close to the stem of the T-valve;

(2) Install the 3 miniature load cells on the 3 grooves respectively, so that the stress points of the miniature load cells face the tail of the pig, and output the signal lines of the miniature load cells to the instrument and computer;

(3), process the annular thin gasket, put the annular thin gasket on the valve stem of the T-shaped valve, so that the annular thin gasket is close to the stress points of the three miniature load cells;

(4) According to the length of the T-type valve, process the sleeve whose length is less than the length of the T-type valve, so that the sleeve is placed on the back section of the T-type valve, and the front end of the sleeve is close to the above-mentioned annular thin gasket; in the T-type valve The end of the tube is processed with external thread, and after the sleeve is set, the nut knob is placed on the external thread, and the displacement of the T-shaped valve is adjusted through the knob nut;

(5) Block the anti-jamming jet pig with the above-mentioned assembled miniature load cell, annular thin gasket and sleeve in the pipeline, adjust the gas flow of the pipeline to the required pipeline flow, under this condition Under this condition, the impact force of the airflow under different displacements can be obtained by using the instrument of the miniature load cell itself and the existing computer acquisition system.

In the above-mentioned step (4), the forward displacement of the baffle plate of the T-shaped valve is adjusted by adjusting the above-mentioned nut, and the displacement after optimization includes 0, 5mm, 7.5mm, 10mm, and 12.5mm;

Then use the method of step (5) to obtain the force value of the T-shaped valve under the above-mentioned displacement; it can be used as the required parameter for how to design the spring.

An anti-jamming jet pipe pig internal valve force test system, including three miniature force sensors with instruments and a computer data acquisition device in the prior art, is characterized in that it includes a tubular body with a hollow structure, the The front end of the tubular body is provided with a tapered hole; and a T-shaped valve is provided in the cavity of the tubular body, and the T-shaped valve is installed in the inner cavity of the tubular body through two support plates at the front and rear, and the T-shaped valve can be positioned along the The length direction of the tubular body moves; the support plate is a hollow structure; the T-end of the T-shaped valve is arranged at the front end of the tubular body, and is larger than the inner diameter of the tapered hole at the front end; the rear end close to the rear end of the T-shaped valve Three grooves are processed on the three ribs of the support plate, the three grooves are processed from the tail of the tubular body to the head, and the three grooves are close to the valve stem of the T-shaped valve; the three micro force measuring The sensors are respectively installed in the three grooves, and the stress point of the miniature load cell is towards the tail of the tubular body; there is also a ring-shaped gasket set on the valve stem of the T-shaped valve, and the ring-shaped gasket is close to the On the stress points of the three miniature load cells; it also includes a sleeve placed in the rear section of the T-shaped valve, and one end of the sleeve is close to the above-mentioned annular thin gasket; an external thread is processed at the end of the T-shaped valve, And after the sleeve is set, the nut knob is placed on the external thread, and the displacement of the T-shaped valve is adjusted through the knob nut.

An anti-jamming jet pipe pig internal valve force test system, including three miniature force sensors with instruments and a computer data acquisition device in the prior art, is characterized in that it includes a tubular body with a hollow structure, the The front end of the tubular body is provided with a tapered hole; the tapered hole can be obtained by installing a tapered tube in the front port of the tubular body, and several fixing flanges are arranged at intervals on the outer walls of the front and rear ends of the tubular body and used for The flange ribs supporting the fixed flange, the front and rear ends of the tubular body respectively have a guide plate and a plurality of leather cups fixed on the outer wall of the tubular body through the pressure plate flange and fastening bolts; and the guide plates at the front and rear ends There is an isolated steel pipe between the flow plate and the cup at this end; and a T-shaped valve is arranged in the cavity of the tubular body, and the T-shaped valve is installed in the inner cavity of the tubular body through two supporting plates at the front and rear, and the T-shaped valve The valve can move along the length direction of the tubular body; the support plate is a hollow structure; the T-end of the T-shaped valve is arranged at the front end of the tubular body and is larger than the inner diameter of the tapered hole at the front end; close to the T Three grooves are processed on the three ribs of the rear support plate at the rear end of the T-type valve, and the three grooves are processed from the tail of the tubular body to the head, and the three grooves are close to the valve stem of the T-type valve; Three miniature load cells are respectively installed in the three grooves, and the stress point of the miniature load cell is towards the tail of the tubular body; there is also an annular thin gasket set on the valve stem of the T-shaped valve, and the ring The thin gasket is attached to the stress points of the three miniature load cells; it also includes a sleeve placed in the rear section of the T-shaped valve, and one end of the sleeve is close to the above-mentioned annular thin gasket; at the end of the T-shaped valve The external thread is processed, and after the sleeve is put on, the nut is turned on the external thread, and the displacement of the T-shaped valve is adjusted through the knob nut.

The taper of the above-mentioned tapered hole may be 30°-60°.

During the normal operation of the pig, the spring element will not be compressed, and once the speed of the pig is reduced or even stuck in the pipeline, the speed difference between the pig and the airflow will increase, and the impact force of the valve will increase , the spring receives a certain pressure, and the spring will move toward the head of the pig until the flow channel is completely blocked, so as to realize the blockage and restart of the jet pig. In the present invention, during the impact process of gas flow, the duration shall not be less than 10 minutes; the values obtained by the instrument and the data acquisition system can be mutually verified.

The valve force test method described in the present invention has wide applicability, and can carry out force test research on the valves of jet pigs used in different pipe diameters, and at the same time, the microstructure reduces the influence on the gas flow channel; The force sensor can be evenly and stably fixed in the support plate, and the plane determined by it is perpendicular to the airflow impact direction, which is basically consistent with the impact of the airflow on the valve in the actual pipeline, and can realize the accuracy of the force test of the valve; the miniature force sensor Connecting with a computer can realize the remote transmission of the test signal, which is also conducive to improving the test accuracy.

Description of drawings

Fig. 1 is a structural schematic diagram of the force testing system of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Fig. 3 is a front view and a side view of the rear support plate without grooves.

Fig. 4 is a front view and a side view of the grooved rear support plate.

Fig. 5 is a front view and a side view of the rear support plate with the miniature load cell installed in the groove.

Fig. 6 is a front view and a side view of the shim installed in Fig. 5 .

Fig. 7 is a structural schematic diagram of another pig force testing system of the present invention.

Fig. 8 is a B-B sectional view of Fig. 7 .

Among them, 1 deflector plate, 2 leather cup, 3 pressure plate flange, 4 isolated steel pipe, 5 fastening bolt, 6 tubular body, 7 fixed flange, 8 flange rib plate, 9 tapered pipe, 10a front support plate, 10b rear support plate, 11T type valve, 12 miniature load cell, 13 thin gasket, 14 sleeve, 15 nut, 16 groove.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing, but the inventive method is not limited to following examples.

Valve stress testing method of the present invention is carried out according to the following steps:

Step 1. Install the components of the anti-jamming jet pig according to the method shown in Figure 1, and finally install the 14 nuts;

Step 2, install the advanced miniature load cell 12 on the support plate 10b with hollow holes, and transmit its signal line to the digital display instrument outside the pipeline;

Step 3, control the force point of the miniature force sensor to be located on the same plane, and install the 12 pads on the plane where the force point of the miniature force sensor is located;

Step 4. Install the sleeve on the 11 valve rod, so that the front end of the 13 sleeve is in contact with the thin gasket 12, but no force is generated;

Step 5. Install the 14 nut on the 11 valve rod, and also ensure that the nut and the sleeve are only in contact without any force.

Step 6. Transmitting the signal of the miniature load cell to the computer data acquisition system for force monitoring.

Step 7. Block the jet pig in the test pipeline, and turn on the air supply of the compressor to provide a certain fixed air volume. The stabilization time is not less than 10 minutes, and the force value is read.

During the operation of the pig, the spring will have different compressions, process sleeves of different lengths, and test the impact force of the air flow on the valve rod at different positions, so that a suitable spring can be designed to achieve anti-seize Intended function of plugging jet pigs.

As shown in Fig. 1-6, an anti-jamming jet pipe pig internal valve force test system includes three miniature load cells 12 with instruments and a computer data acquisition device thereof in the prior art, and is characterized in that it includes a It has a hollow structure tubular body 6, and the front end of the tubular body 6 is provided with a tapered hole; and a T-shaped valve 11 is arranged in the cavity of the tubular body 6, and the T-shaped valve 11 is installed through two support plates (10a, 10b) at the front and rear In the inner cavity of the tubular body 6, the T-shaped valve 11 can move along the length direction of the tubular body 6; the support plate is a hollow structure; the T-shaped end of the T-shaped valve 11 is located on the The front end of the tubular body 6 is larger than the inner diameter of the front end tapered hole; three grooves 16 are processed on the three ribs of the rear support plate 10b near the T-shaped valve 11 rear end, and the three grooves 16 are formed from the tubular body 6 afterbody It is processed towards the head direction, and the three grooves 16 are close to the valve stem of the T-shaped valve 11; the three miniature load cells 12 are respectively installed in the three grooves 16, and the force points of the miniature load cells 12 are Toward the tail end direction of the tubular body 6; there is also an annular thin gasket 13 sleeved on the valve stem of the T-shaped valve 11, and the annular thin gasket 13 is close to the stress points of the three miniature load cells 12; It also includes a sleeve 14 sleeved in the rear section of the T-shaped valve 11, and one end of the sleeve 14 is close to the above-mentioned annular thin gasket 13; an external thread is processed at the end of the T-shaped valve 11, and the upper sleeve 14 is sleeved Then the nut 15 is turned on the external thread, and the displacement of the T-shaped valve 11 is adjusted by the knob nut 15 .

As shown in Figure 3-8, an anti-jamming jet pipe pig internal valve stress test system includes three miniature load cells 12 with instruments and its computer data acquisition device, and a tubular body 6 with a hollow structure, This tubular body 6 front ends are provided with tapered hole; A plurality of fixed flanges 7 and flange ribs 8 for supporting the fixed flanges 7 are arranged at intervals, and a guide plate 1 and a plurality of leather cups 2 are respectively arranged at the front and rear ends of the tubular body 6 through the pressure plate flange 3, fastened The bolt 5 is fixed on the outer wall of the tubular body 6; and an isolation steel pipe 4 is provided between the diversion plate 1 at the front and rear ends and the leather cup 2 at this end; and a T-shaped valve 11 is arranged in the cavity of the tubular body 6, and the T-shaped The valve 11 is installed in the inner cavity of the tubular body 6 through two front and rear support plates (10a, 10b), and the T-shaped valve can move along the length direction of the tubular body 6; the support plate is a hollow structure; The T-shaped end of the T-shaped valve 11 is arranged on the front end of the tubular body 6, and is larger than the inner diameter of the front tapered hole; three grooves 16 are processed on the three ribs of the rear support plate 10b near the rear end of the T-shaped valve 11. , 3 grooves 16 are processed from the end of the tubular body 6 to the head, and the 3 grooves 16 are close to the valve stem of the T-shaped valve 11; the three miniature load cells 12 are respectively installed in the 3 grooves 16, The stress point of the miniature load cell 12 is towards the afterbody direction of the tubular body 6; there is also an annular thin gasket 13 sleeved on the valve stem of the T-shaped valve 11, and the annular thin gasket 13 is close to the three miniature measuring cells. On the force point of the force sensor 12; it also includes a sleeve 14 sleeved on the rear section of the T-shaped valve 11, and one end of the sleeve 14 is close to the above-mentioned annular thin gasket 13; an external thread is processed at the end of the T-shaped valve 11 , and after the upper sleeve 14 is sleeved, the nut 15 is turned on the external thread, and the displacement of the T-shaped valve 11 is adjusted by turning the nut 15 .

Claims (5)

1. an Anti-blockage jet flow tube cleaner internal valves forces testing method, is characterized in that comprising the following steps:

(1), will on three floors of Anti-blockage jet flow tube cleaner to be measured rear end back up pad (10b), process 3 grooves (16), 3 grooves (16) are to process to cephalad direction from rabbit afterbody, and 3 grooves are near the valve rod of T-shaped valve (11);

(2) 3 miniature force cells (12) are arranged on respectively on 3 grooves, make the stress point of miniature force cell (12) towards the caudal directions of rabbit, and the signal wire of miniature force cell (12) is transported to instrument and computing machine outward;

(3), process annular shim liner (13), annular shim liner (13) is placed on the valve rod of T-shaped valve (11), annular shim liner (13) is close on the stress point of three miniature force-measuring sensings (12) device;

(4), according to T-shaped valve (11) length, processing length is less than the sleeve (14) of T-shaped valve (11) length, make sleeve (14) be placed on the back segment of T-shaped valve (11), and sleeve (14) front end is pressed close to above-mentioned annular shim liner (13); End at T-shaped valve (11) is processed with external thread, and be nested with upper bush (14) afterwards by nut (15) knob on external thread, by knob nut (15) to regulate the displacement of T-shaped valve (11).

(5), by above-mentioned assembled miniature force cell (12), annular shim liner (13) with the Anti-blockage jet flow tube cleaner blocking of sleeve (14) in pipeline, the gas flow of pipeline is adjusted to required pipeline flow, with this understanding, utilize miniature force cell self instrument and existing computer acquisition system, can obtain the gas shock power under different displacements.

2. a kind of Anti-blockage jet flow tube cleaner internal valves forces testing method as claimed in claim 1, it is characterized in that in above-mentioned steps (4), by regulating baffle plate that above-mentioned nut adjusts T-shaped valve (11) displacement forward, described displacement comprises 0,5mm, 7.5mm, 10mm, 12.5mm.

3. an Anti-blockage jet flow tube cleaner internal valves forces testing system, comprise that three with miniature force cell (12) and the computer data acquiring device thereof of instrument, it is characterized in that comprising that one has hollow-core construction tubular body (6), this tubular body (6) front end is provided with bellmouth; And in the cavity of tubular body (6), be provided with a T-shaped valve (11), this T-shaped valve (11) is arranged on the inner chamber of described tubular body (6) by 2 of front and back back up pad (10a, 10b), and T-shaped valve (11) can be along the length direction play of described tubular body (6); Described back up pad is engraved structure; The T-shaped end of described T-shaped valve (11) is located at the front end of described tubular body (6), and is greater than the internal diameter of front end bellmouth; On three floors of the rear bearing sheet (10b) of close T-shaped valve (11) rear end, process 3 grooves (16), 3 grooves (16) are to process to cephalad direction from tubular body (6) afterbody, and 3 grooves (16) are near the valve rod of T-shaped valve (11); Described three miniature force cells (12) are arranged on respectively in 3 grooves (16), and the stress point of miniature force cell (12) is towards the caudal directions of tubular body (6); Be placed in addition the annular shim liner (13) on the valve rod of T-shaped valve (11), and annular shim liner (13) is close on the stress point of three miniature force cells (12); Also comprise the sleeve (14) that is placed on T-shaped valve (11) back segment, and above-mentioned annular shim liner (13) is pressed close in one end of sleeve (14); End at T-shaped valve (11) is processed with external thread, and be nested with upper bush (14) afterwards by nut (15) knob on external thread, by knob nut (15) to regulate the displacement of T-shaped valve (11).

4. an Anti-blockage jet flow tube cleaner internal valves forces testing system, comprise that three with miniature force cell (12) and the computer data acquiring device thereof of instrument, it is characterized in that comprising that one has hollow-core construction tubular body (6), this tubular body (6) front end is provided with bellmouth; On the outer wall of the rear and front end of described tubular body (6), interval arranges several mounting flanges (7) and for supporting the flange floor (8) of mounting flange (7), the rear and front end of tubular body (6) has respectively a flow guiding disc (1) and a plurality of leather cup (2) to be fixed on the outer wall of tubular body (6) by pressing plate flange (3), fastening bolt (5); And between the leather cup (2) of the flow guiding disc of described rear and front end (1) and local terminal, be provided with isolation steel pipe (4); And in the cavity of tubular body (6), be provided with a T-shaped valve (11), this T-shaped valve (11) is installed on the inner chamber of described tubular body (6) by front and back (2) individual back up pad (10a, 10b), and T-shaped valve (11) can be along the length direction play of described tubular body (6); Described back up pad is engraved structure; The T-shaped end of described T-shaped valve (11) is located at the front end of described tubular body (6), and is greater than the internal diameter of front end bellmouth; On three floors of the rear bearing sheet (10b) of close T-shaped valve (11) rear end, process 3 grooves (16), 3 grooves (16) are to process to cephalad direction from tubular body (6) afterbody, and 3 grooves (16) are near the valve rod of T-shaped valve (11); Described three miniature force cells (12) are arranged on respectively in 3 grooves (16), and the stress point of miniature force cell (12) is towards the caudal directions of tubular body (6); Be placed in addition the annular shim liner (13) on the valve rod of T-shaped valve (11), and annular shim liner (13) is close on the stress point of three miniature force cells (12); Also comprise the sleeve (14) that is placed on T-shaped valve (11) back segment, and above-mentioned annular shim liner (13) is pressed close in one end of sleeve (1) 4; End at T-shaped valve (11) is processed with external thread, and be nested with upper bush (14) afterwards by nut (15) knob on external thread, by knob nut (15) to regulate the displacement of T-shaped valve (11).

5. the test macro as described in claim 3 or 4, is characterized in that the tapering of described bellmouth can be 30 °-60 °.