CN112610766B - Pipeline waste gas leakage-proof structure - Google Patents

Abstract

The invention discloses a pipeline waste gas leakage-proof structure, aiming at solving the defects that the pipeline connection sealing performance is poor and the leakage is not easy to find in time. The invention comprises a front-stage pipe and a rear-stage pipe, wherein a flange is arranged at the end part of the front-stage pipe, a connecting cylinder is arranged at the end part of the rear-stage pipe, the flange is inserted in the connecting cylinder and is tightly attached and connected with the bottom of the connecting cylinder, a sealing gasket is arranged between the end surface of the flange and the bottom surface of the connecting cylinder, a sealing cover is tightly connected between the end part of the connecting cylinder and the front-stage pipe, a piston ring is arranged in the connecting cylinder, a positioning spring is arranged between the piston ring and the sealing cover, a plurality of exhaust holes are formed in the sealing cover, outer plugs are inserted at the outer ends of the exhaust holes, the inner ends of the exhaust holes are communicated with tapered holes, a mounting frame is connected to the sealing cover, a movable sealing plug is arranged on the mounting frame, a force storage spring is arranged between the sealing plug and the mounting frame, a plurality of limiting posts are slidably arranged on the mounting frame, the end parts of the limiting posts abut against the sealing plugs, ejector rods are arranged on the limiting posts, and push rods for pushing the ejector rods are arranged on the piston ring.

Description

An anti-leakage structure for pipeline exhaust gas

technical field

The present invention relates to a pipeline connection structure, more particularly, it relates to an anti-leakage structure of pipeline exhaust gas.

Background technique

At present, the exhaust gas is generally discharged through the pipeline. Since the exhaust gas is under pressure in the process of transportation in the pipeline, the sealing performance of the transportation pipeline is required to be high. Once the exhaust gas leaks, it will cause pollution to the environment and even cause safety accidents. The most prone to leakage of the pipeline is generally at the joint of the pipeline. The two adjacent pipelines are generally connected by flanges, and the connecting end face is sealed with a sealing ring. This traditional connection method has poor sealing effect, and the leakage cannot be detected in time.

SUMMARY OF THE INVENTION

In order to overcome the above deficiencies, the present invention provides an anti-leakage structure for pipeline exhaust gas, which has good sealing effect and is easy to find in time once leakage occurs.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: an anti-leakage structure for pipeline exhaust gas, comprising a front-stage pipe and a back-stage pipe, the end of the front-stage pipe is provided with a flange, and the end of the back-stage pipe is provided with a connecting cylinder, The flange is inserted in the connecting cylinder and is closely connected with the bottom of the connecting cylinder. A sealing gasket is installed between the flange end face and the bottom surface of the connecting cylinder, and the sealing cover is tightly connected between the end of the connecting cylinder and the fore-stage pipe. Piston ring, a positioning spring is installed between the piston ring and the sealing cover, the sealing cover is provided with a number of exhaust holes, the outer end of the exhaust hole is inserted with an outer plug, the inner end of the exhaust hole is connected to a conical hole, and the sealing cover is connected with a mounting A movable closing plug is installed on the mounting frame, the closing plug and the conical hole are correspondingly adapted, a force accumulating spring is installed between the closing plug and the installation frame, and a number of limit posts are slidably installed on the installation frame, and the ends of the limit posts are in contact with each other. Connected to the closing plug, a number of push rods are arranged on the piston ring and the limit column correspondingly, the end of the push rod is provided with an inclined push surface, and the limit column is provided with a push rod; as the piston ring moves to the direction of the sealing cover , the pushing surface can abut on the top cover and push the limit post away from the closing plug, so that the closing plug is ejected to the position of the conical hole, and the outer wall of the closing plug is in sealing contact with the inner wall of the conical hole.

The anti-leakage structure of pipeline exhaust gas is placed between the front-stage pipe and the back-stage pipe. The gasket between the flange end face and the bottom surface of the connecting cylinder plays the role of the first layer of sealing. When the seal at the position of the gasket fails, the leaked medium enters the piston. In the cavity between the ring and the flange, the piston ring is preloaded by the positioning spring, which can resist a certain medium pressure. At this time, the piston ring plays the role of the second layer of sealing. When the medium pressure is too large, the piston ring is further pushed, and the exhaust hole is exhausted at this time, which is convenient for the piston ring to move. With the further movement of the piston ring, the push rod on the piston ring pushes the top rod to move, so that the limit post is separated from the closing plug, the closing plug is ejected to the position of the conical hole, and the outer wall of the closing plug is sealed against the inner wall of the conical hole, accumulating force. The spring provides ejection force to the closing plug, and at the same time positions the ejected closing plug, so as to ensure the tightness between the outer wall of the closing plug and the inner wall of the conical hole. The cavity between the piston ring and the sealing cover forms a closed cavity and plays the role of the third layer of sealing. Through the three-layer sealing effect, the sealing effect is greatly improved. Moreover, when the second layer of sealing function fails, a warning can be issued, which is convenient for timely detection. The anti-leakage structure of the pipeline exhaust gas has good sealing effect, and it is easy to find out the leakage in time.

Preferably, the inner edge of the sealing gasket is provided with a sealing reinforcement part, and the sealing reinforcement part includes a sealing convex ring, a transition ring and a sealing sleeve. The cross section of the sealing convex ring is circular, and the cross section of the transition ring is triangular. A ring groove adapted to the sealing convex ring is formed between the inner wall of the fore-stage pipe and the end face of the back-stage pipe, and the sealing convex ring is tightly installed in the ring groove. Both are provided with chamfers, and the transition ring is tightly installed between the two chamfers.

The arrangement of the sealing reinforcement part forms a non-planar sealing surface between the flange end surface and the bottom surface of the connecting cylinder, which is beneficial to improve the sealing effect.

Preferably, there is a hollow sealing ring on the inner wall of the conical hole, the hollow part of the sealing ring is filled with sealant, and the outer wall of the sealing plug is provided with a number of poking pins corresponding to the sealing ring, and the poking pins can pierce the sealing ring to extrude the sealant .

When the sealing plug is ejected into the conical hole, the poking needle punctures the sealing ring to extrude the sealant between the outer wall of the sealing plug and the inner wall of the conical hole, which is beneficial to improve the sealing effect of the sealing ring.

Preferably, a blowing whistle is installed in the exhaust hole. When the exhaust hole is exhausted, the blowing whistle is blown towards, which is convenient for timely detection of air leakage.

Preferably, the inner plug is installed in the exhaust hole, the inner end of the outer plug is provided with a storage slot, and the storage slot is filled with colored powder. The setting of the inner plug enables the colored powder to be pressed out together with the outer plug, and the colored powder is easy to be detected by the naked eye.

Preferably, a plurality of limit guide rods are arranged on the mounting frame, a convex ring is arranged on the outer wall of the closing plug, and the convex ring and the limit guide rod are movably sleeved. The limit guide rod plays a good role in positioning and guiding the closure plug, ensuring that the closure plug can be accurately ejected into the conical hole.

Preferably, an impact plate is correspondingly connected to the fore-stage pipe and the outer plug. The outer plug pushed out makes a sound when it hits the impact plate, which is convenient for timely detection of leakage.

Preferably, a sliding sleeve is installed on the mounting frame corresponding to the limit post, a preload spring is installed in the slide sleeve, a flange is provided on the limit post, the preload spring abuts on the flange, and the flange abuts on the installation frame On the upper side, the limit post runs through both ends of the sliding sleeve. The pre-tightening spring has a good pre-tightening effect on the limit column, and the limit column slides in the sliding sleeve, which is stable and reliable.

Preferably, a plurality of spring positioning rings are provided on the inner end surface of the sealing cover and the exhaust holes in a one-to-one correspondence, and positioning springs are installed between the spring positioning rings and the piston ring. The spring positioning ring is conducive to the reliable installation of the positioning spring.

Preferably, the end of the connecting cylinder is provided with a stepped surface, the outer wall of the fore-stage pipe is provided with a mounting convex ring, the inner end surface of the sealing cover is tightly connected between the end surface of the mounting convex ring and the stepped surface, and the inner end surface of the sealing cover is installed between the stepped surface The outer sealing gasket is installed between the inner end face of the sealing cover and the end face of the mounting convex ring. The arrangement of this structure improves the sealing performance between the sealing cover, the connecting cylinder and the mounting convex ring.

Compared with the prior art, the present invention has the beneficial effects that the sealing effect of the anti-leakage structure for pipeline exhaust gas is good, and it is easy to find out the leakage in time once the leakage occurs.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the partial enlarged schematic diagram of the present invention;

In the picture: 1. Pre-stage pipe, 2. Back-stage pipe, 3. Flange, 4. Connecting cylinder, 5. Connecting column, 6. Nut, 7. Sealing gasket, 8. Sealing convex ring, 9. Transition ring, 10, sealing sleeve, 11, sealing cover, 12, piston ring, 13, positioning spring, 14, exhaust hole, 15, outer plug, 16, impact plate, 17, tapered hole, 18, mounting bracket, 19, closed Plug, 20, accumulating spring, 21, limit post, 22, push rod, 23, push surface, 24, ejector rod, 25, sealing ring, 26, poking needle, 27, blowing whistle, 28, inner plug, 29, storage slot, 30, limit guide rod, 31, convex ring, 32, sliding sleeve, 33, preload spring, 34, spring positioning ring, 35, stepped surface, 36, installation convex ring, 37, outer gasket Sheet, 38, inner sealing gasket.

Detailed ways

Below by specific embodiment, and in conjunction with accompanying drawing, the technical scheme of the present invention is further described in detail:

Embodiment: A pipeline exhaust gas leakage prevention structure (see Figure 1 and Figure 2), comprising a front-stage pipe 1 and a back-stage pipe 2, the end of the front-stage pipe is provided with a flange 3, and the end of the back-stage pipe is provided with a flange 3. The connecting cylinder 4, the flange is inserted into the connecting cylinder and is closely connected with the bottom of the connecting cylinder. The bottom of the connecting cylinder is integrally formed with a plurality of evenly arranged connecting posts 5, and there are several connecting posts on the flange corresponding to one another. The connection hole, the connection post passes through the connection hole and is locked by the nut 6. A sealing gasket 7 is installed between the flange end surface and the bottom surface of the connecting cylinder, and a plurality of through holes are arranged on the sealing gasket and the connecting column in one-to-one correspondence, and the through holes are inserted into the connecting column. The inner edge of the gasket is provided with a sealing reinforcement, which includes a sealing convex ring 8, a transition ring 9, and a sealing sleeve 10. The cross section of the sealing convex ring is circular, and the cross section of the transition ring is triangular, and the sealing sleeve is attached to the inner wall of the fore-stage pipe. A ring groove adapted to the sealing convex ring is formed between the inner wall of the fore-stage pipe and the end face of the back-stage pipe, and the sealing convex ring is tightly installed in the ring groove. Both are provided with chamfers, and the transition ring is tightly installed between the two chamfers.

A sealing cover 11 is tightly connected between the end of the connecting cylinder and the fore-stage pipe, a piston ring 12 is installed in the connecting cylinder, a positioning spring 13 is installed between the piston ring and the sealing cover, and there are several exhaust holes 14 on the sealing cover. An outer plug 15 is inserted at the outer end, and an impact plate 16 is correspondingly connected to the fore-stage pipe and the outer plug. The inner end of the exhaust hole is connected to the conical hole 17, the sealing cover is connected with a mounting frame 18, and a movable closing plug 19 is installed on the mounting frame. Force spring 20, a number of limit posts 21 are slidably installed on the mounting frame, the ends of the limit posts are abutted on the closing plug, a number of push rods 22 are correspondingly arranged on the piston ring and the limit posts, and the ends of the push rods are provided with inclined settings The push surface 23 of the stopper is provided with a push rod 24; as the piston ring moves toward the sealing cover, the push surface can abut on the top cover and push the stopper column away from the closing plug, so that the closing plug is ejected into the conical hole position, the outer wall of the closure plug is in sealing contact with the inner wall of the conical hole.

There is a hollow sealing ring 25 on the inner wall of the conical hole, the hollow part of the sealing ring is filled with sealant, and a number of poking pins 26 are arranged on the outer wall of the sealing plug corresponding to the sealing ring, and the poking pins can pierce the sealing ring to extrude the sealant. O-rings are installed on the inner wall of the tapered hole and the outer wall of the closing plug. A blowing whistle 27 is installed in the exhaust hole. The inner plug 28 is installed in the exhaust hole, and the inner end of the outer plug is provided with a storage slot 29, and the storage slot is filled with colored powder. A plurality of limit guide rods 30 are arranged on the mounting frame, and a convex ring 31 is arranged on the outer wall of the closing plug, and the convex ring and the limit guide rod are movably sleeved.

A sliding sleeve 32 is installed on the mounting frame and the limit post correspondingly, a pre-tightening spring 33 is installed in the sliding sleeve, a flange is provided on the limit post, the pre-tightening spring abuts on the flange, and the flange abuts on the mounting frame , the limit column runs through both ends of the sliding sleeve. An elongated avoidance groove is arranged on the outer wall of the sliding sleeve, and the ejector rod passes through the avoidance groove. The end of the sliding sleeve is connected to the end cover, and the limit post penetrates the end cover.

A plurality of spring positioning rings 34 are arranged on the inner end surface of the sealing cover and the exhaust holes in a one-to-one correspondence, and positioning springs are installed between the spring positioning rings and the piston ring. The end of the connecting cylinder is provided with a stepped surface 35, and the outer wall of the front-stage tube is provided with a mounting convex ring 36. The inner end surface of the sealing cover is tightly connected between the end surface of the mounting convex ring and the stepped surface, and the outer surface of the sealing cover is installed between the inner end surface and the stepped surface. The sealing gasket 37, the inner sealing gasket 38 is installed between the inner end face of the sealing cover and the end face of the mounting convex ring. A pressure relief hole is arranged between the piston ring on the connecting cylinder and the bottom of the connecting cylinder, and the pressure relief hole is closed after the piston ring is installed on the connecting cylinder. The installation of the piston ring is facilitated by setting the pressure relief hole. The end of the piston ring abuts on the connecting post.

The anti-leakage structure of pipeline exhaust gas is placed between the front-stage pipe and the back-stage pipe. The gasket between the flange end face and the bottom surface of the connecting cylinder plays the role of the first layer of sealing. When the seal at the position of the gasket fails, the leaked medium enters the piston. In the cavity between the ring and the flange, the piston ring is preloaded by the positioning spring, which can resist a certain medium pressure. At this time, the piston ring plays the role of the second layer of sealing. When the medium pressure is too large, the piston ring is further pushed, and the exhaust hole is exhausted at this time, which is convenient for the piston ring to move. With the further movement of the piston ring, the push rod on the piston ring pushes the top rod to move, so that the limit post is separated from the closing plug, the closing plug is ejected to the position of the conical hole, and the outer wall of the closing plug is sealed against the inner wall of the conical hole, accumulating force. The spring provides ejection force to the closing plug, and at the same time positions the ejected closing plug, so as to ensure the tightness between the outer wall of the closing plug and the inner wall of the conical hole. The cavity between the piston ring and the sealing cover forms a closed cavity and plays the role of the third layer of sealing. Through the three-layer sealing effect, the sealing effect is greatly improved. Moreover, when the second layer of sealing function fails, a warning can be issued, which is convenient for timely detection. The anti-leakage structure of the pipeline exhaust gas has good sealing effect, and it is easy to find out the leakage in time.

The above-mentioned embodiments are only preferred solutions of the present invention, and do not limit the present invention in any form. There are other variations and modifications under the premise of not exceeding the technical solutions recorded in the claims.

Claims (10)

1. an anti-leakage structure of pipeline waste gas, it is characterized in that, comprise front-stage pipe, back-stage pipe, front-stage pipe end is provided with flange, back-stage pipe end is provided with connecting tube, flange is inserted in connecting tube It is in close contact with the bottom of the connecting cylinder. A gasket is installed between the flange end face and the bottom surface of the connecting cylinder. The sealing cover is tightly connected between the end of the connecting cylinder and the fore-stage pipe. Piston rings, piston rings and seals are installed in the connecting cylinder. A positioning spring is installed between the covers, a number of exhaust holes are arranged on the sealing cover, an outer plug is inserted at the outer end of the exhaust hole, and the inner end of the exhaust hole is connected to a conical hole, and a mounting frame is connected to the sealing cover, and the installation frame can be installed on the The moving closing plug, the closing plug and the conical hole are correspondingly matched, a force accumulating spring is installed between the closing plug and the mounting frame, a number of limit posts are slidably installed on the mounting frame, the end of the limit post abuts on the closing plug, and the piston A number of push rods are arranged on the ring and the limit column correspondingly, the end of the push rod is provided with an inclined push surface, and the limit column is provided with a push rod; as the piston ring moves toward the sealing cover, the push surface can abut against the top Cover and push the limit post to separate from the closing plug, so that the closing plug is ejected to the position of the conical hole, and the outer wall of the closing plug is sealed and fitted with the inner wall of the conical hole. 2. A pipeline exhaust gas leakage prevention structure according to claim 1, wherein the inner edge of the sealing gasket is provided with a sealing reinforcement portion, and the sealing reinforcement portion comprises a sealing convex ring, a transition ring, and a sealing sleeve, and the sealing convex ring has a cross section of Circular, the cross section of the transition ring is triangular, the sealing sleeve is fitted between the inner wall of the fore-stage pipe and the inner wall of the rear-stage pipe, and a ring groove adapted to the sealing convex ring is formed between the end face of the fore-stage pipe and the latter-stage pipe, and the sealing convex ring It is tightly installed in the ring groove, the inner edges of the opposite ends of the front-stage pipe and the rear-stage pipe are provided with chamfers, and the transition ring is tightly installed between the two chamfers. 3. The structure for preventing leakage of pipeline waste gas according to claim 1, wherein the sealing ring is hollow on the inner wall of the conical hole, the hollow part in the sealing ring is filled with sealant, and the outer wall of the sealing plug corresponds to the sealing ring. There are several poking needles, which can puncture the sealing ring to extrude the sealant. 4. The anti-leakage structure for pipeline exhaust gas according to claim 1, wherein a blowing whistle is installed in the exhaust hole. 5 . The anti-leakage structure for pipeline exhaust gas according to claim 1 , wherein an inner plug is installed in the exhaust hole, a storage slot is arranged at the inner end of the outer plug, and colored powder is installed in the storage slot. 6 . 6. A pipeline exhaust gas leakage prevention structure according to claim 1, wherein a plurality of limit guide rods are arranged on the mounting frame, a convex ring is provided on the outer wall of the closing plug, and the convex ring and the limit guide rod are movable sleeves . 7 . The anti-leakage structure for pipeline exhaust gas according to claim 1 , wherein an impact plate is correspondingly connected to the front-stage pipe and the outer plug. 8 . 8. A pipeline exhaust gas leakage prevention structure according to any one of claims 1 to 7, wherein a sliding sleeve is installed on the mounting frame corresponding to the limit post, and a pre-tightening spring is installed in the slide sleeve, and the limit post A flange is arranged on the upper part, the pre-tightening spring is abutted on the flange, the flange is abutted on the mounting frame, and the limit post penetrates both ends of the sliding sleeve. 9. A pipeline exhaust gas leakage prevention structure according to any one of claims 1 to 7, characterized in that, a plurality of spring positioning rings, spring positioning rings and pistons are provided on the inner end surface of the sealing cover and the exhaust holes in a one-to-one correspondence. Positioning springs are installed between the rings. 10. An anti-leakage structure for pipeline exhaust gas according to any one of claims 1 to 7, wherein the end of the connecting cylinder is provided with a stepped surface, the outer wall of the fore-stage pipe is provided with a mounting convex ring, and the inner end surface of the sealing cover is provided with a stepped surface. It is tightly connected between the end face of the mounting convex ring and the stepped face, the outer sealing gasket is installed between the inner end face of the sealing cover and the stepped face, and the inner sealing gasket is installed between the inner end face of the sealing cover and the end face of the mounting convex ring.

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