CN208687231U - A kind of erosion protection system of buried long gas pipeline - Google Patents

Abstract

The utility model discloses a kind of erosion protection system of buried long gas pipeline, including shell, support plate, the inside of shell and support plate constitute closed protection chamber；The intracavitary setting fixed plate of protection, fixed plate connect shell by spring, and spring is in tensional state always；Protect it is intracavitary be additionally provided with drying box, the shell of drying box is made of rubber, and acacia and lower lock block are provided in shell；Positioning pin is provided on the closed end of shell, bottom surface of the bottom end activity of the positioning pin through top surface to the closed end of shell of the closed end of shell, the bottom cutting of positioning pin has slope, location hole is additionally provided on pedestal, the location hole is used for placement positioning pin, the location hole is stairstepping towards the side of support plate, and the diameter of the location hole is gradually increased from bottom to top.The utility model is effectively protected screw bolt and nut and is not corroded and damages, and extends maintenance period, reduces maintenance difficulties.

Description

A kind of erosion protection system of buried long gas pipeline

Technical field

The utility model relates to gas pipeline corrosion-resistant fields, and in particular to a kind of anticorrosion dress of buried long gas pipeline It sets.

Background technique

Gas pipeline is mainly for delivery of natural gas, liquefied petroleum gas and artificial coal gas.It is big that gas pipeline is dispersed throughout China Jiangnan north is to complete natural gas, liquefied petroleum gas and the transmission of artificial coal gas.

Transport vehicle of the buried pipeline as oil gas, one of critical facility of ground surface works.It is connection upstream resource under The tie for swimming user, since pipeline is embedded in underground for a long time, over time, the factors such as extraneous soil characteristic and landform sedimentation Influence, pipeline can occur burn into perforation, leakage, field and country bring serious economic loss.Moreover, corrosive pipeline The leakage that harmful substance can also be caused, pollutes the environment, or even can also cause the disaster accident of burst, jeopardizes personal peace Entirely.For conveying the long distance pipeline and collection transmission pipe network of natural gas, the use of technology for external corrosion-proofing of pipeline and construction quality direct relation To the safe operation and service life of pipeline.

Technology for external corrosion-proofing of pipeline mainly includes the mode for coating external anti-corrosion layer, cathodic protection or both and combining.Anti-corrosion Although layer can cover the most surfaces of gas pipeline, when the monitoring device for being equipped with cathodic protection on pipeline for example passes Sensor, or when passing through other erosion resistant coating integrity degree detection devices, need to be connected through a screw thread above equipment is fixed on pipeline On.

Due to the structure of bolt and nut itself, anticorrosive paint will not be usually coated to bolt and nut, meanwhile, landform sedimentation etc. Factor can also squeeze bolt and nut, cause bolt card in the screw hole on pipeline or pedestal, when serious, or even bolt be caused to damage It is bad, when leading to service conduit, bolt can not be taken out from screw hole, and then need to destroy the pedestal of monitoring device, maintenance cost Height, maintenance process are complicated.

Utility model content

The purpose of this utility model is to provide a kind of erosion protection systems of buried long gas pipeline, to solve the prior art In bolt failure caused by protection exposure bolt and nut in the soil or be not stuck in screw hole targetedly, cause pipeline Problem difficult in maintenance, maintenance cost is high.

The utility model is achieved through the following technical solutions:

A kind of erosion protection system of buried long gas pipeline, including setting are examined in cathodic protection monitoring device or erosion resistant coating Survey the shell and support plate on the pedestal of device, wherein the shell can be moved along the surface of pedestal, and shell is towards support plate One end be open end, the support plate is fixedly mounted on pedestal, when the open end of shell squeezes on the supporting plate, shell Inside and support plate constitute closed protection chamber；The protection is intracavitary to be provided with the fixed plate being mounted on the base, described solid Spring is provided on fixed board, the spring is connected to the inner wall of shell, and spring is in tensional state always；Protect intracavitary also set up There is the drying box for accommodating desiccant, the drying box is placed on the top of bolt, and the shell of drying box is made of rubber, outside Acacia and lower lock block are provided in shell, the acacia bottom end is bore spine portion, and the bottom end of acacia is placed on the bottom surface of shell, thorn The top surface of shell is run through on the top of block, the top of acacia not with contacted at the top of shell, shell is run through on the top of the lower lock block Top surface, and the top of lower lock block is contacted with case top, and the bottom end of lower lock block is contacted with the bottom surface of shell；The closed end of shell On be provided with positioning pin, the bottom of the bottom end activity of the positioning pin through top surface to the closed end of shell of the closed end of shell The bottom cutting in face, positioning pin has slope, and location hole is additionally provided on pedestal, and the location hole is used for placement positioning pin, institute It is stairstepping that location hole, which is stated, towards the side of support plate, and the diameter of the location hole is gradually increased from bottom to top.

In the prior art, the monitoring device of cathodic protection or the defect detecting device of external anti-corrosion layer are installed outside pipeline When, it is usually to be connected through a screw thread for above-mentioned monitoring device or detection device to be fixed on pipeline, or be fixed on the outside of pipeline Mounting ring on.But either it is fixed wherein, have nut and part bolt be exposed in monitoring device or detection device Pedestal on.After pipeline is buried, the moisture in soil will be used as electrolyte, and oxidation reaction occurs as anode in bolt and nut, Iron ion is generated, the deformed threads on bolt and nut is caused, gets rusty on screw thread, ultimately cause bolt card in the screw thread of screw hole, It can not normal demounting bolt.In addition, the variation that landform generates will squeeze exposed screw bolt and nut, bolt, nut are caused Different degrees of deformation.To sum up, soil characteristic, topography variation can cause burn into broken to the exposed nuts and bolt on pedestal It is bad.

But although bolt can not be detected periodically along pipe indirect review corrosive pipeline degree after pipeline is buried The corrosion condition of nut can only excavate soil layer and directly be detected.So often will appear bolt, nut when maintenance The case where having damaged or can not normally having taken out from screw hole, staff has to destroy pedestal, causes maintenance difficult, dimension Protect the problems such as at high cost.

To solve the above-mentioned problems, the utility model provides a kind of anticorrosion being set in outside screw bolt and nut and sets It is standby.

Specifically, it according to actual demands such as soil characteristic, topography variations, is examined in cathodic protection monitoring device or erosion resistant coating It surveys on the device such as pedestal of various kinds of sensors, sensor mounting ring, namely is provided at screw hole and the corrosion protection equipment is set.

The corrosion protection equipment includes the support plate being fixedly mounted on pedestal, and the mode of fixed installation can be removably Fixed form is for example threadedly coupled, is clamped, and is also possible to non-removable fixed form and for example welds, is bonded, it is preferable that support Plate is welded on pedestal.Corrosion protection equipment further includes shell, and shell one end is open end, and the other end is closed end, split shed It holds and matches with the size of support plate, when open end squeezes on the supporting plate, the inside of shell and support plate collectively form envelope The protection chamber closed.Protection chamber not only avoids soil from contacting with bolt, nut, and then the moisture in soil is prevented to exist as electrolyte The corrosion that electrochemical reaction accelerates bolt and nut is generated on bolt and nut；Meanwhile shell forms bolt and nut and protects, and avoids soil Earth, which directly squeezes, protects intracavitary bolt and nut, landform settles bolt and nut can after shell damages completely just now by Extruding from shell, is effectively protected screw bolt and nut.One group of bolt and nut both can be only protected in protection chamber, it can also be with Protect multiple groups bolt and nut.

In order to ensure protection chamber completely encloses in a state of use, can be opened during installation or removal.It is protecting Protect it is intracavitary be provided with fixed plate, be provided with spring in fixed plate, spring connects the inner wall of shell.Spring is in stretching shape always State provides the active force for being directed toward fixed plate on the position of spring and shell, so that shell is not under the action of by external force, shell The open end of body can squeeze forms closed protection chamber on the supporting plate.

When topography variation is larger, shell may unbearable soil extruding and damage, found by practice, spot failure It is concentrated mainly on the joint of shell and support plate.Case top deforms after bearing soil extruding force towards pedestal, duct orientation, When extruding force is smaller, the engagement between shell and support plate is not close, and case top will be extruded into protection when extruding force is larger It is intracavitary, no matter which kind of situation, protection chamber will completely enclose no longer, and moisture moist in part soil and soil will be at this time Enter to enclosure interior and contacted with bolt and nut, accelerates the corrosion rate of bolt and nut, the protective effect of shell and corrosion-resisting function Decline.

In order to solve this problem, protection is intracavitary is additionally provided with drying box, and desiccant, desiccant are placed in the drying box Commercially available any desiccant can be used, it is preferable that desiccant uses molecular sieve.It is further preferred that drying box will protect it is intracavitary It is divided into upper and lower two parts, the bottom of drying box is placed on above bolt.The shell of drying box is made of rubber, and is set on shell It is equipped with several through-holes, it is preferable that the shell of drying box is made of fluorubber, and fluorubber has certain degree of hardness not only to support drying Agent, while there is stronger resistance to acid and alkali, when being soil contact, compared to other class rubber not vulnerable to the corrosion of soil.Outside Acacia and lower lock block are provided in shell, the bottom end of acacia is bore spine portion, and bore spine portion bottom end is placed on the bottom surface of shell, and acacia Top run through shell top surface, and be located at shell top, acacia top not with contacted at the top of shell；The bottom end of lower lock block It is placed on the bottom surface of shell, the top of lower lock block is fixed on the top surface of shell.

By above-mentioned setting, under guard mode, the desiccant in drying box can ensure that closed protection is intracavitary wet Degree is lower than the humidity of surrounding soil, protects the intracavitary situation in relatively dry, slows down the corrosion rate of bolt, nut, extends Maintenance period.When the landform arround generates biggish variation and causes to protect chamber no longer completely enclosed, the top of shell is to protection During intracavitary movement, it will drive lower lock block first and squeeze shell ground, shell made of rubber is caused to generate certain deformation, Through-hole on shell is stretched, and bolt and nut is dried in the partially dried dose of lower section for falling into shell, and shell generates at this time It is reversible deformation；If soil continuous deformation, shell continues that acacia will be squeezed, acacia moves down crowded towards protection chamber movement Enclosure bottom is pressed, the bore spine portion of acacia bottom will puncture shell, so that outer casing bottom generation crack, and the moving distance of lower lock block Greater than acacia, the bottom of shell will be further pullled, final outer casing bottom generates sufficiently large opening, so that interior of shell Desiccant falls completely within the lower section of shell, and soil is isolated to a certain extent and enters protection chamber for shell at this time, forms first and protects again, And the molecular sieve dropped out from shell surrounds bolt and nut, second is formed around it protects again, and soil is being prevented to enter protection To protecting intracavitary air to be dried while chamber squeezes bolt and nut, reduces and protect intracavitary humidity.By above-mentioned dual Protection, even if topography variation causes to protect chamber not re-closed, drying box can still play desiccation well, not only act as Certain buffering effect, removal part extruding force, while reducing the corrosion efficiency of bolt and nut.

In order to be operated convenient for staff, need for shell to be fixed on the base when dismantling or installing bolt, nut. The utility model offers location hole on pedestal, and positioning pin is offered on the closed end of shell, and positioning pin activity runs through Closed top and bottom, and the top of positioning pin is located at the top of shell.When installing or removing bolt, nut, work people Member pushes shell mobile towards the direction far from support plate, when positioning pin is located above location hole, effect of the positioning pin in gravity Under move and eventually fallen into location hole straight down and be clamped so that shell is fixed relative to pedestal, operated convenient for staff Bolt, nut.

Cutting has a slope on the bottom surface of positioning pin, and slope is plane, and the size of positioning pin bottom is from bottom to up gradually Become larger.Positioning hole is provided with stepped side, and stepped side is close to side where support plate, and the diameter of location hole is from bottom to top It is incrementally increased in staged, above structure makes positioning pin possess both locking and unlocking in location hole state.Lock shape Under state, the curved surface side of positioning pin is contacted with the stepped side of location hole, and the ladder of stepped side will be to perpendicular to level The curved surface side in face generates Intercepting effects, and cooperation housings close end is used for the duct of placement positioning pin, and stepped side prevents fixed Position pin movement, so that shell is fixed on the base.Under unlocked state, rotational positioning pin, so that the slope of positioning pin bottom Face is contacted with stepped side, and adjacent two ladder of stepped side can be mentioned with slope face contact at housings close end Under the active force towards support plate supplied, positioning pin will move straight up along stepped side, eventually disengage from location hole.It is logical Above-mentioned setting is crossed, the operating procedure of staff is further simplified, so that maintenance work is easier.

Further, clamping portion is provided on the side of the positioning pin, the clamping portion is set as the rank with location hole The ladder-type structure that trapezoidal side matches.In order to improve under lock state, the bond strength of positioning pin and location hole is being positioned Clamping portion is set on the side opposite with slope on pin, the card access surface of clamping portion and stepped side is also ladder-type structure, And the ladder-type structure is complementary with the ladder-type structure of stepped side, and when clamping portion is contacted with stepped side, stairstepping Each ladder on side can cause to obstruct to clamping portion, avoid positioning pin from moving straight up to unlock, further increase The stability and reliability of device direct motion.

Further, non-slip mat is provided on the clamping portion, the non-slip mat is made of nitrile rubber.The card of clamping portion Non-slip mat is arranged in junction can further increase the combination dynamics of card access surface and stepped side.Non-slip mat preferably uses fourth Nitrile rubber is made, and nitrile rubber coefficient of friction with higher can effectively improve the frictional force of faying face.

Further, instruction unit is provided at the top of the positioning pin.Instruction unit can there are many implementations, such as can To be an image identification, it is also possible to a prominent structure, effect is to indicate that staff is when the direction of front positioning pin Lock state or unlocked state, for example, positioning pin is adjusted to lock state, works as positioning later when needing to open shell Locking can be realized after falling in location hole in pin, improves locking efficiency, prevents staff's maloperation.

Further, it is provided with card slot in the support plate, is provided on the open end of the shell and card slot size phase Matched card convex.Card slot can play a supporting role to card convex, reinforce the intensity of shell and squeezed caused by soil deformation with resisting Pressure.

Further, it is provided with to be located in support plate and protects intracavitary supporting block, the supporting block, bolt support outer jointly Shell.Supporting block can preferably support housing, while after shell breakage, shell can preferably be laid on supporting block, bolt Top effectively prevents soil from contacting with bolt and nut.

Further, the outer casing bottom setting is fluted, and the groove is used to be clamped with the top of bolt.Groove is advantageous In positioning of the shell in protection chamber, and after shell is damaged, preferably protection chamber is divide into upper part and lower part, with formation pair The first of bolt and nut is protected again.

Further, the acacia is between lower lock block and fixed plate.

Further, the shell is made of fluorubber, and several through-holes are provided on the shell, and the through-hole connection is outer The inner surface and the outer surface of shell.Through-hole not only contributes to the molecular sieve dry-run protection chamber inner air of interior of shell, while also just After shell is pierced through in bore spine portion, the expansion of outer casing bottom opening.

Further, the blanking cover to match with location hole opening size is provided on the location hole.Blanking cover avoid silt, Soil blocks location hole.

The utility model compared with prior art, has the following advantages and benefits:

1, the protection chamber of the utility model not only avoids soil from contacting with bolt, nut, and then prevents the moisture in soil The corrosion that electrochemical reaction accelerates bolt and nut is generated on bolt and nut as electrolyte；Meanwhile shell is to bolt and nut shape At protection, avoids soil from directly squeezing and protect intracavitary bolt and nut, it can be complete in shell landform settles bolt and nut Screw bolt and nut is effectively protected by the extruding from shell just now after damage.Meanwhile the utility model structure it is simple, Whether using flexible, staff can use the device according to flexible choice situations such as soil characteristic, the topography variation in area, And screw hole quantity of the device for protection, there is extensive promotional value；

2, the utility model is protecting intracavitary setting drying box, the drying in the unbroken situation of shell, in drying box Agent can ensure that the intracavitary humidity of closed protection is lower than the humidity of surrounding soil, protect the intracavitary situation in relatively dry, Slow down the corrosion rate of bolt, nut, extends maintenance period；The landform arround, which generates biggish variation, to be caused to protect chamber no longer complete When totally-enclosed, the top of shell will drive lower lock block first and squeeze shell ground, cause during to intracavitary movement is protected Shell made of rubber generates certain deformation, and the through-hole on shell is stretched, and partially dried dose falls into the lower section of shell to bolt Nut is dried, and what shell generated at this time is reversible deformation；If soil continuous deformation, shell continues to move towards protection chamber It is dynamic, acacia will be squeezed, acacia moves down extruding enclosure bottom, and the bore spine portion of acacia bottom will puncture shell, so that shell bottom Portion generates crack, and the moving distance of lower lock block is greater than acacia, will further pull the bottom of shell, and final outer casing bottom generates Sufficiently large opening, so that the desiccant of interior of shell falls completely within the lower section of shell, shell is isolated to a certain extent at this time Soil enters protection chamber, forms the molecular sieve that first protects again, and drop out from shell and surrounds bolt and nut, is formed around it Second protects again, is preventing soil from entering while protection chamber squeezes bolt and nut to protecting intracavitary air to be dried, is dropping Minimum living protects intracavitary humidity；By above-mentioned duplicate protection, even if topography variation causes to protect chamber not re-closed, drying box still can Desiccation well is enough played, not only acts as certain buffering effect, removal part extruding force, while reducing bolt and nut Corrosion efficiency；

3, the utility model has the location hole of stepped side, and the positioning pin with clamping portion by setting, makes It obtains positioning pin and has unlock and locking two states in location hole, be further simplified the operating procedure of staff, so that dimension Nurse makees easier；

4, spring is arranged inside housings the utility model, and shell can be effectively protected spring, so that spring is always It keeps good elasticity and pulling force is generated to shell, it is ensured that device stable operation.

Detailed description of the invention

Attached drawing described herein is used to provide to further understand the utility model embodiment, constitutes the one of the application Part does not constitute the restriction to the utility model embodiment.In the accompanying drawings:

Fig. 1 is the structural schematic diagram of the utility model specific embodiment；

Fig. 2 is the schematic diagram in the utility model specific embodiment under positioning pin unlocked state；

Fig. 3 is the schematic diagram in the utility model specific embodiment under positioning pin lock state.

Label and corresponding parts title in attached drawing:

1- shell, 2- support plate, 3- fixed plate, 4- spring, 5- positioning pin, 6- supporting block, 7- shell, 8- acacia, under 9- Briquetting, 10- instruction unit, 11- blanking cover, 12- location hole, 13- pedestal, 14- pipeline, 15- bolt.

Specific embodiment

For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing, The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this Utility model is not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that term "front", "rear", "left", "right", "upper", "lower", The orientation or positional relationship of the instructions such as "vertical", "horizontal", "high", " low " "inner", "outside" be orientation based on the figure or Positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or member of indication or suggestion meaning Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as protecting model to the utility model The limitation enclosed.

Embodiment 1:

The erosion protection system of the buried long gas pipeline of one kind as shown in Figure 1, including be arranged in cathodic protection monitoring device Or shell 1 and support plate 2 on the pedestal 13 of erosion resistant coating detection device, wherein the shell 1 can be along the surface of pedestal 13 Mobile, shell 1 is open end towards one end of support plate 2, and the support plate 2 is fixedly mounted on pedestal 13, when opening for shell 1 When mouth end is extruded in support plate 2, the inside of shell 1 and support plate 2 constitute closed protection chamber；The protection is intracavitary to be provided with The fixed plate 3 being mounted on pedestal 13 is provided with spring 4 in the fixed plate 3, and the spring 4 is connected to the inner wall of shell 1, Spring 4 is in tensional state always；The intracavitary drying box being additionally provided with for accommodating desiccant is protected, the drying box is placed on The shell 7 of the top of bolt 15, drying box is made of rubber, and acacia 8 and lower lock block 9,8 bottom of acacia are provided in shell 7 End is bore spine portion, and the bottom end of acacia 8 is placed on the bottom surface of shell 7, and the top surface of shell 7, acacia 8 are run through in the top of acacia 8 Top do not contacted with the top of shell 1, the top surface of shell 7 is run through on the top of the lower lock block 9, and the top of lower lock block 9 with It is contacted at the top of shell 1, the bottom end of lower lock block 9 is contacted with the bottom surface of shell 7；Positioning pin 5, institute are provided on the closed end of shell 1 The bottom end activity of positioning pin 5 is stated through the bottom surface of top surface to the closed end of shell 1 of the closed end of shell 1, the bottom of positioning pin 5 Cutting has slope, and location hole 12 is additionally provided on pedestal 13, and the location hole 12 is used for placement positioning pin 5, the location hole 12 towards the side of support plate 2 be stairstepping, and the diameter of the location hole is gradually increased from bottom to top；The top of the positioning pin 5 Portion is provided with instruction unit 10；It is provided with card slot in the support plate 2, is provided on the open end of the shell 1 and card slot size The card convex to match；It is provided with to be located in support plate 2 and protects intracavitary supporting block 6, the supporting block 6, bolt 15 support jointly Shell 7；7 bottom of the shell setting is fluted, and the groove is used to be clamped with the top of bolt 15；Acacia 8 is located at lower lock block 9 Between fixed plate 3；The shell 7 is made of fluorubber, and several through-holes are provided on the shell 7, and the through-hole connection is outer The inner surface and the outer surface of shell 7；The blanking cover 11 to match with 12 opening size of location hole is provided on the location hole 12.

Above-mentioned apparatus uses according to the following steps:

(A) according to 10 position of instruction unit, positioning pin 5 is adjusted to lock state, to the direction movement far from support plate 2 At shell 1 to location hole 12, positioning pin 5 is fallen into location hole 12, and shell 1 is fixed relative to pedestal 13；

(B) bolt 15 and nut are installed in screw hole；

(C) dry molecular sieve is filled into shell 7, blocks two molecular sieves respectively using acacia 8, lower lock block 9 later Feed inlet, it is ensured that the bottom end of acacia 8 is contacted with the bottom surface of shell 7, the bottom end of lower lock block 9 is contacted with the bottom surface of shell 7；

(D) drying box is placed in supporting block 6 and bolt 15, the groove and bolt 15 of 7 bottom of shell of drying box are right Together；

(E) by rotational positioning pin 5 to unlocked state after, shell 1 is mobile towards support plate 2 and finally squeezes support plate 2 Closed protection chamber is formed to protect internal screw bolt and nut.

It by above-mentioned setting, protects chamber that soil is not only avoided to contact with bolt 15, nut, and then prevents the moisture in soil The corrosion that electrochemical reaction accelerates bolt 15, nut is generated on bolt 15, nut as electrolyte；Meanwhile shell 1 is to bolt 15, nut forms protection, avoids soil from directly squeezing and protects intracavitary bolt 15, nut, even if landform settles bolt 15, nut Also bolt 15 and nut can be effectively protected after shell 1 completely damage just now by the extruding from shell 1.Meanwhile this Utility model structure is simple, using flexible, and staff can flexibly select according to situations such as soil characteristic, topography variation in area The screw hole quantity for whether being used for protection using the device and the device is selected, there is extensive promotional value.

Embodiment 2:

As shown in Figures 2 and 3, on the basis of embodiment 1, clamping portion, the clamping are provided on the side of positioning pin 5 Portion is set as the ladder-type structure to match with the stepped side of location hole 12.

Embodiment 3:

On the basis of embodiment 2, non-slip mat is provided on clamping portion, the non-slip mat is made of nitrile rubber.

Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced It changes, improve, should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of erosion protection system of buried long gas pipeline, which is characterized in that including setting in cathodic protection monitoring device or Shell (1) and support plate (2) on the pedestal (13) of person's erosion resistant coating detection device, wherein the shell (1) can be along pedestal (13) surface is mobile, and shell (1) is open end towards one end of support plate (2), and the support plate (2) is fixedly mounted on pedestal (13) on, when the open end of shell (1) is extruded on support plate (2), the inside and support plate (2) of shell (1), which are constituted, to be closed Protection chamber；The protection is intracavitary to be provided with the fixed plate (3) being mounted on pedestal (13), is provided on the fixed plate (3) Spring (4), the spring (4) are connected to the inner wall of shell (1), and spring (4) is in tensional state always；Protect intracavitary also set up There is the drying box for accommodating desiccant, the drying box is placed on the top of bolt (15), and the shell (7) of drying box is by rubber It is made, is provided with acacia (8) and lower lock block (9) in shell (7), acacia (8) bottom end is bore spine portion, and the bottom of acacia (8) End is placed on the bottom surface of shell (7), and the top surface of shell (7) is run through on the top of acacia (8), the top of acacia (8) not with shell (1) top surface of shell (7), and the top of lower lock block (9) and shell (1) are run through in top contact, the top of the lower lock block (9) Top contact, the bottom end of lower lock block (9) is contacted with the bottom surface of shell (7)；Positioning pin (5) are provided on the closed end of shell (1), The bottom end activity of the positioning pin (5) runs through the bottom surface of closed end of the top surface of the closed end of shell (1) to shell (1), positioning The bottom cutting of pin (5) has slope, is additionally provided on pedestal (13) location hole (12), and the location hole (12) is fixed for placing Position pin (5), the location hole (12) towards the side of support plate (2) be stairstepping, the diameter of the location hole from bottom to top by It is cumulative big.

2. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the positioning pin (5) clamping portion is provided on side, the clamping portion is set as the ladder to match with the stepped side of location hole (12) Shape structure.

3. the erosion protection system of the buried long gas pipeline of one kind according to claim 2, which is characterized in that the clamping portion On be provided with non-slip mat, the non-slip mat is made of nitrile rubber.

4. the erosion protection system of the buried long gas pipeline of one kind according to claim 2, which is characterized in that the positioning pin (5) instruction unit (10) are provided at the top of.

5. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the support plate (2) it is provided with card slot on, is provided with the card convex to match with card slot size on the open end of the shell (1).

6. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that support plate (2) On be provided with to be located at and protect intracavitary supporting block (6), the supporting block (6), the common support housing (7) of bolt (15).

7. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the shell (7) bottom setting is fluted, and the groove is used to be clamped with the top of bolt (15).

8. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the acacia (8) between lower lock block (9) and fixed plate (3).

9. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the shell (7) it is made of fluorubber, several through-holes, the inner surface and appearance of through-hole connection shell (7) is provided on the shell (7) Face.

10. the erosion protection system of the buried long gas pipeline of one kind according to claim 1, which is characterized in that the positioning The blanking cover (11) to match with location hole (12) opening size is provided on hole (12).