Pipeline detection sampling valve

Abstract

The utility model provides a pipeline detection sampling valve which structurally comprises a butt joint pipe, a butt joint hole is formed in the middle of the left side of the butt joint pipe, a sampling pipe is detachably connected to the middle of the left side of the butt joint pipe in a clamped mode, an isolation base is fixedly connected to a feed port in the right end of the sampling pipe through a bolt, and a plug abuts against the middle of the isolation base. When the plug is matched with the conical surface of the isolation seat, liquid in the butt joint pipe cannot flow into the sampling pipe, at the moment, the reset spring on the inner side of the left end of the plug is compressed, the air outlet of the flow channel of the valve rod is exposed, and the air guide hole, the flow channel and the vent hole are communicated. A user can fill an external gas source into the gas guide hole through the quick-release connector, and the end cover is detached from the left side of the sampling pipe, so that the user can conveniently perform high-pressure gas purging treatment on the sampling pipe before sampling, and residual impurities in the sampling pipe are prevented from influencing the sampling result.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to sampling valve technical field, concretely relates to a pipeline detection sampling valve. BACKGROUND

[0002] The sampling valve is a valve for obtaining medium samples in a pipeline or equipment, and is used in occasions where chemical analysis of the medium samples is required frequently. The sampling valve is mainly installed at 2 / 3 of the height of the material in the tank body, or on the pump outlet or the main pipe of the material, considering the convenience of maintenance and safety.

[0003] The existing patent (publication number: CN111912670A) discloses a pipeline detection sampling valve, relating to the field of pipeline sampling valves, comprising a sampling valve body, which is rotatably connected to a pipeline for extracting liquid in the pipeline; a liquid outlet pipe, which is fixedly connected to the surface of the sampling valve body and communicates with the sampling valve body; and a dustproof assembly, which is arranged outside the liquid outlet pipe to prevent the liquid outlet pipe from being contaminated. The existing sampling valve often needs to hold the barrel wall of the sampling valve with one hand and pull out the rear handle with the other hand to pull the valve core inside and suck the sampling liquid from the liquid taking pipe during use.

[0004] In the process of implementing the scheme, the dustproof assembly is provided to prevent the liquid outlet pipe from being contaminated during sampling operation, but there is a lack of cleaning measures for the residual liquid in the liquid outlet pipe, and multiple sampling operations are required in actual production, which leads to contamination of the sample in subsequent sampling operations and affects the accuracy of subsequent detection results. UTILITY MODEL CONTENTS

[0005] 1. Technical problem solved by the utility model:

[0006] The utility model provides a pipeline detection sampling valve, which solves the problem of insufficient anti-pollution design of the existing equipment.

[0007] 2. Technical scheme:

[0008] To achieve the above-mentioned purpose, the utility model provides a technical scheme: a pipeline detection sampling valve, comprising the following structure:

[0009] The butt joint pipe is provided with a butt joint hole in the left middle part, and a sampling pipe is detachably connected to the left middle part of the butt joint pipe.

[0010] The valve stem is provided with a gas guide hole from the left end to the right end.

[0011] Further, the front and rear ends of the butt joint pipe are welded with auxiliary frames, the outer side of the butt joint pipe is fixed with a cover shell, the front and rear openings of the butt joint pipe are communicated with the front and rear openings of the cover shell, the inner walls of the cover shell are fixedly connected with the outer sides of the two auxiliary frames through bolts, and the front and rear side ports of the cover shell are fixedly connected with the feeding guide pipe and the discharging guide pipe through bolts.

[0012] Further, the left end of the sampling pipe is fixedly connected with an end cover through bolts, and the left end of the sampling pipe is lower than the height of the right end.

[0013] Further, the left end of the sampling pipe is fixedly connected with an end cover through bolts, and the left end of the sampling pipe is lower than the height of the right end.

[0014] Further, the left end of the sampling pipe is fixedly connected with an end cover through bolts, and the left end of the sampling pipe is lower than the height of the right end.

[0015] Further, the left end of the sampling pipe is fixedly connected with an end cover through bolts, and the left end of the sampling pipe is lower than the height of the right end.

[0016] Further, the left end of the sampling pipe is fixedly connected with an end cover through bolts, and the left end of the sampling pipe is lower than the height of the right end.

[0017] 3. Beneficial effects:

[0018] Compared with the prior art, the technical scheme has the following beneficial effects:

[0019] The pipe detection sampling valve has the beneficial effects that when the plug and the taper surface of the isolation seat cooperate, the liquid in the butt joint pipe cannot flow into the sampling pipe, at this time, the reset spring in the left end of the plug is compressed, the flow passage gas outlet of the valve rod is exposed, the air guide hole, the flow passage and the air hole are communicated, the user can fill the air guide hole with the external air source through the quick release connector, and the end cover is removed from the left side of the sampling pipe, so that the user can conveniently perform high-pressure gas blowing treatment on the sampling pipe before sampling, and the influence of residual impurities in the sampling pipe on the sampling result is avoided.

[0020] The parts not involved in the device are the same as or can be implemented by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the perspective view of the structure of the utility model;

[0022] Figure 2 is the perspective view of the structure of the utility model Figure 1 is the enlarged view of structure A in the utility model;

[0023] Figure 3 is the half cutaway perspective view of the structure of the utility model butt joint pipe;

[0024] Figure 4 is the perspective view of the structure of the utility model Figure 3 is the enlarged view of structure B in the utility model;

[0025] Figure 5 is the half cutaway perspective view of the structure of the utility model butt joint pipe;

[0026] Figure 6 is the enlarged view of structure C in the utility model; Figure 5

[0027] Figure 7 is the half cutaway perspective view of the structure of the utility model plug;

[0028] Figure 8 is the enlarged view of structure D in the utility model. Figure 7

[0029] REFERENCE NUMERALS:

[0030] butt joint pipe-1; butt joint hole-11; auxiliary frame-12; cover-13; feeding guide pipe-14; discharging guide pipe-15;

[0031] sampling pipe-2; end cover-21;

[0032] isolation seat-3; conical surface-31; sealing ring-32;

[0033] plug-4; air hole-41; reset spring-42;

[0034] valve rod-5; air guide hole-51; quick release joint-52; flow channel-53;

[0035] limiting nut-6; limiting spring-61;

[0036] sleeve-7; limiting rod-71. DETAILED DESCRIPTION

[0037] ​​For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings, the drawings give several embodiments of the utility model, however, the utility model can be realized in many different forms, and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be intervening elements; the terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for purposes of description only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs; the terminology used in the specification of the utility model herein is only for the purpose of describing specific embodiments and is not intended to limit the utility model; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] Referring to the drawings Figures 1-8 The utility model provides a pipeline detection sampling valve, including the following structure:

[0041] The butt joint pipe 1 is provided with a butt joint hole 11 in the middle of the left side, and the sampling pipe 2 is detachably connected to the middle of the left side of the butt joint pipe 1, the right end of the sampling pipe 2 is fixedly connected with the isolation seat 3 through bolts, and the middle of the isolation seat 3 is in contact with the plug 4.

[0042] The valve rod 5 is provided with a gas guide hole 51 from the left end to the right end.

[0043] In this embodiment, the front and rear ends of the butt joint pipe 1 are welded with auxiliary frames 12, the outer side of the butt joint pipe 1 is fixedly provided with a cover 13, the front and rear ends of the butt joint pipe 1 are communicated with the front and rear ends of the cover 13, the inner walls of the front and rear sides of the cover 13 are fixedly connected with the outer sides of the two auxiliary frames 12 through bolts, and the front and rear side ports of the cover 13 are fixedly connected with the feed guide pipe 14 and the discharge guide pipe 15 through bolts.

[0044] The butt joint pipe 1, the cover 13, the feed guide pipe 14 and the discharge guide pipe 15 cooperate to form a material conveying flow channel 53.

[0045] In this embodiment, the left end of the sampling pipe 2 is fixedly connected with an end cover 21 through bolts, and the height of the left end of the sampling pipe 2 is lower than that of the right end.

[0046] After the sampling tube 2 is filled with the sampling liquid, a collection barrel or a measuring cup is placed at the left end of the sampling tube 2, and then the end cover 21 is removed, so that the liquid in the sampling tube 2 can flow into the collection vessel.

[0047] In this embodiment, the middle part of the left end of the isolation seat 3 is fixedly provided with a tapered surface 31, the middle part of the tapered surface 31 abuts against the left end of the plug 4, and the outer side of the middle part of the isolation seat 3 is sleeved with a sealing ring 32, and the outer side of the sealing ring 32 extends into the butt joint hole 11.

[0048] The sealing ring 32 is arranged between the isolation seat 3 and the butt joint pipe 1, so as to avoid leakage of the liquid in the butt joint pipe 1 through the assembly gap between the isolation seat 3 and the butt joint pipe 1.

[0049] In this embodiment, the left end of the plug 4 is fixedly provided with a plurality of air vents 41, the air inlet side of the air vent 41 extends to the inner side of the left end of the plug 4, the air outlet side of the air vent 41 extends to the air guide hole 51, the inner side of the left end of the plug 4 is detachably connected with a return spring 42, the inner side of the left end of the plug 4 is movably sleeved with the right end of the valve rod 5, and the left end of the return spring 42 is connected with the right end of the valve rod 5.

[0050] When the plug 4 cooperates with the tapered surface 31 of the isolation seat 3, the liquid in the butt joint pipe 1 cannot flow into the sampling tube 2, at this time, the return spring 42 at the inner side of the left end of the plug 4 is compressed, the air outlet of the flow channel 53 of the valve rod 5 is exposed, the air guide hole 51, the flow channel 53 and the air vent 41 are communicated, the user can fill the air guide hole 51 with an external air source through the quick release connector 52, and the end cover 21 is removed from the left side of the sampling tube 2, so as to facilitate the user to perform high-pressure gas blowing treatment on the sampling tube 2 before sampling, and avoid that the residual impurities in the sampling tube 2 affect the sampling result.

[0051] In this embodiment, the left end of the valve rod 5 penetrates through the right end to the left end of the sampling tube 2, the left end of the valve rod 5 penetrates through the inner side to the left end of the outer side of the cover 13, the left end of the valve rod 5 is threadedly connected with the quick release connector 52, the right end of the valve rod 5 is fixedly provided with the flow channel 53, the air inlet of the flow channel 53 is communicated with the air guide hole 51, and the air outlet of the flow channel 53 is arranged in a staggered manner with the air vent 41.

[0052] In the sampling operation, the valve rod 5 drives the plug 4 to move leftwards, the connection between the left side of the plug 4 and the middle part of the tapered surface 31 is released, the liquid in the butt joint pipe 1 can flow into the sampling tube 2 through the isolation seat 3, at this time, the return spring 42 is stretched between the plug 4 and the valve rod 5, the flow channel 53 of the valve rod 5 is designed in a staggered manner with the air vent 41 of the plug 4, and the flow channel 53 and the air vent 41 are not communicated, so as to avoid that the liquid in the sampling tube 2 enters the air guide hole 51.

[0053] The left end of the valve rod 5 is threadedly connected with a limiting nut 6, the right side of the limiting nut 6 is in abutment with the left end of a limiting spring 61, the right end of the limiting spring 61 is in abutment with the left side of the cover 13, the left end of the valve rod 5 is sleeved with a sleeve 7, the left end of the sleeve 7 is threadedly connected with a limiting rod 71, the right end of the limiting rod 71 is clamped with the outside of the limiting nut 6, and the right end of the sleeve 7 is movably clamped with the left side of the cover 13.

[0054] When the sampling operation is carried out, the sleeve 7 and the limiting rod 71 are used to twist the limiting nut 6, so as to release the limiting spring 61, at this time, the limiting spring 61 and the cover 13 are used to pull the limiting spring 61, and the pulling force of the limiting spring 61 is weaker than the liquid conveying pressure in the connecting pipe 1, the liquid in the connecting pipe 1 pushes the plug 4 to flow into the sampling pipe 2.

[0055] When the sampling operation is carried out, the sleeve 7 and the limiting rod 71 are used to twist the limiting nut 6, so as to release the limiting spring 61, at this time, the limiting spring 61 and the cover 13 are used to pull the limiting spring 61, and the pulling force of the limiting spring 61 is weaker than the liquid conveying pressure in the connecting pipe 1, the liquid in the connecting pipe 1 pushes the plug 4 to flow into the sampling pipe 2.

[0056] The above embodiment only expresses certain implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope; it should be pointed out that, for ordinary skilled person in the art, without departing from the utility model concept, a plurality of deformations and improvements can be made, which belong to the protection scope of the utility model; therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A pipeline inspection sampling valve, characterized in that: Includes the following structure: The connecting pipe (1) has a docking hole (11) in the middle of the left side, and a sampling tube (2) is detachably snapped into the middle of the left side of the connecting pipe (1). An isolation seat (3) is fixedly connected to the feed inlet at the right end of the sampling tube (2) by bolts. A plug (4) is abutted in the middle of the isolation seat (3). The valve stem (5) has an air guide hole (51) extending from its left end to its right end.

2. The pipeline inspection sampling valve according to claim 1, characterized in that: The front and rear ends of the connecting pipe (1) are welded with auxiliary frames (12). The outer side of the connecting pipe (1) is fixed with a cover (13). The front and rear openings of the connecting pipe (1) are connected to the front and rear openings of the cover (13). The front and rear sides of the inner wall of the cover (13) are respectively fixedly connected to the outer side of the two auxiliary frames (12) by bolts. The front and rear ports of the cover (13) are respectively fixedly connected with the feed guide pipe (14) and the discharge guide pipe (15) by bolts.

3. A pipeline inspection sampling valve according to claim 1, characterized in that: The bottom left end of the sampling tube (2) is fixedly connected to an end cap (21) by bolts, and the height of the left end of the sampling tube (2) is lower than the height of its right end.

4. A pipeline inspection sampling valve according to claim 1, characterized in that: The middle of the left end of the isolation seat (3) is fixed with a conical surface (31), the middle of which abuts against the left end of the plug (4), and a sealing ring (32) is sleeved on the outer side of the middle of the isolation seat (3), the outer side of which extends into the mating hole (11).

5. A pipeline inspection sampling valve according to claim 1, characterized in that: The left end of the plug (4) is fixed with a plurality of vent holes (41). The air inlet side of the vent hole (41) extends to the inner side of the left end of the plug (4), and the air outlet side of the vent hole (41) extends into the air guide hole (51). A return spring (42) is detachably snapped into the inner side of the left end of the plug (4). The inner side of the left end of the plug (4) is movably sleeved with the right end of the valve stem (5). The left end of the return spring (42) is snapped into the right end of the valve stem (5).

6. A pipeline inspection sampling valve according to claim 1, characterized in that: The left end of the valve stem (5) passes through the right end to the left end of the sampling tube (2). The left end of the valve stem (5) passes through the inside of the cover (13) to the outside of the left end. The left end of the valve stem (5) is threaded with a quick-release connector (52). The right end of the valve stem (5) is fixed with a flow channel (53). The air inlet of the flow channel (53) is connected to the air guide hole (51). The air outlet of the flow channel (53) and the air vent (41) are misaligned.

7. A pipeline inspection sampling valve according to claim 1, characterized in that: The left end of the valve stem (5) is threaded with a limiting nut (6). The right side of the limiting nut (6) abuts against the left end of the limiting spring (61). The right end of the limiting spring (61) abuts against the left side of the cover (13). The left end of the valve stem (5) is fitted with a sleeve (7). The left end of the sleeve (7) is threaded with a limiting rod (71). The right end of the limiting rod (71) is engaged with the outside of the limiting nut (6). The right end of the sleeve (7) is engaged with the left side of the cover (13).

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