A plate heat exchanger sampling and measuring device

Abstract

The present invention belongs to the technical field of heat exchanger sampling, and discloses a plate heat exchanger sampling and measuring device, including a sampling pipe connected to the upper end of the inlet pipe and / or outlet pipe of the plate heat exchanger, a sealed liquid outlet control component is installed at the lower end of the sampling pipe, a sampling bottle liquid inlet channel is arranged on the liquid outlet control component, a sampling bottle is detachably installed at the upper end of the sampling pipe, and the upper end of the liquid outlet control component is plugged into the sampling bottle; a control rod is sealed at the upper end of the sampling bottle, and the lower end of the control rod extends into the sampling bottle and is detachably connected to the upper end of the liquid outlet control component. The present invention does not allow the liquid to contact the air and dust in the air when collecting liquid, and after the sampling is completed, the liquid outlet control component is reversely controlled by the control rod to continue to block the sampling pipe, so that the sampling bottle can be removed, and the control rod can be used to block the sampling bottle while removing it, so as to ensure the sealing of the sampling bottle.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchanger sampling, and in particular relates to a plate heat exchanger sampling and measuring device. Background Art

[0002] The plate heat exchanger is a high-efficiency heat exchanger made of a series of metal sheets with a certain corrugated shape. A mesh channel is formed between the plates. The sealing gasket seals the cold and hot media in the heat exchanger, and at the same time reasonably separates the cold and hot media to prevent them from mixing. The cold and hot fluids flow in the channel at intervals, and can flow countercurrently or downstream as needed. During the flow process, the cold and hot fluids exchange heat through the plate wall, thereby achieving the desired effect.

[0003] Compared with common tube heat exchangers, plate heat exchangers have the advantages of high heat transfer coefficient, strong adaptability, compact structure, small size, easy disassembly, cleaning and repair, etc.; at the same time, they also have disadvantages such as poor sealing, easy leakage, low working pressure, not resistant to high temperature, easy to clog, etc. In actual production, the sealing gaskets usually age and break, resulting in internal or external leakage of the plate exchanger. When external leakage occurs, it is often easy to find, and system isolation measures can be taken. When internal leakage of the plate exchanger occurs, it is usually not easy to find, and conclusions can only be drawn through comprehensive judgment and analysis of the properties or parameters of the medium inside.

[0004] When an existing plate heat exchanger is in use, a U-shaped tube is generally installed on the inlet pipe or outlet pipe of the plate heat exchanger. Valves are set at both ends of the U-shaped tube to control the flow of liquid. A valve is set in the middle of the U-shaped tube to facilitate sampling after the liquid flows out. However, this sampling method will directly contact the outside air and dust in the air when the liquid flows out, resulting in inaccurate detection results. Summary of the invention

[0005] The purpose of the present invention is to provide a plate heat exchanger sampling and measuring device to solve the above problems existing in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A plate heat exchanger sampling and measuring device comprises a sampling pipe connected to the upper end of an inlet pipe and / or an outlet pipe of the plate heat exchanger, a liquid outlet control component with a sealing arrangement is installed at the lower end of the sampling pipe, a liquid inlet channel for a sampling bottle is arranged on the liquid outlet control component, a sampling bottle is detachably installed at the upper end of the sampling pipe, the upper end of the liquid outlet control component is plugged into the sampling bottle, so that the outlet of the liquid inlet channel of the sampling bottle is connected to the interior of the sampling bottle; a control rod is sealably installed at the upper end of the sampling bottle, the lower end of the control rod extends into the sampling bottle and is detachably connected to the upper end of the liquid outlet control component, so as to control the action of the liquid outlet control component through the control rod, thereby allowing the liquid in the inlet pipe and / or the outlet pipe to enter the corresponding sampling bottle through the liquid inlet channel of the sampling bottle, and cooperate with the sealing of the sampling bottle when the sampling bottle is taken out of the sampling pipe.

[0008] As a preferred technical solution in the present invention, the liquid outlet control component includes a liquid outlet plate and a liquid inlet tube arranged on the upper end of the liquid outlet plate, and the liquid outlet plate is evenly distributed with a plurality of liquid inlet holes located below the control rod. The upper end of the liquid inlet tube passes through the lower end of the sampling bottle and is inserted into the interior of the sampling bottle, and the lower end of the liquid inlet tube cooperates with the middle part of the liquid outlet plate for sealing, and a sealing ring is fixed on the outer wall of the lower end of the liquid inlet tube, and the sealing ring cooperates with all the liquid inlet holes on the liquid outlet plate for sealing; the upper end of the liquid inlet tube is detachably connected to the lower end of the control rod, and the liquid inlet tube can be controlled by the control rod to move away from or close to the liquid outlet plate. When the liquid inlet tube is away from the liquid outlet plate and a middle flow cavity is formed between the two, the liquid inlet tube, the middle flow cavity and all the liquid inlet holes cooperate to form the liquid inlet channel of the sampling bottle.

[0009] As a preferred technical solution in the present invention, a liquid inlet cavity is provided at the lower end of the sampling pipeline, a liquid outlet plate is fixed at the lower end of the liquid inlet cavity, and a sealing ring is threadedly connected to the liquid inlet cavity; a first sealing ring installed at the upper end of the sealing ring is provided outside the liquid inlet pipe.

[0010] As a preferred technical solution in the present invention, a conical installation cavity with an inner diameter gradually decreasing from top to bottom is provided in the middle of the sampling pipeline, the lower end of the conical installation cavity is matched and connected with the upper end of the liquid inlet channel of the sampling bottle, and the sampling bottle is installed at the upper end of the conical installation cavity.

[0011] As a preferred technical solution in the present invention, a first through hole is opened at the lower end of the sampling pipe, the upper end of the liquid outlet control component matches and passes through the first through hole, and a plurality of liquid outlet holes connected to the interior of the sampling bottle are arranged on the side wall of the upper end of the liquid outlet control component, and all the liquid outlet holes are located below the control rod; two arc-shaped limit grooves are symmetrically distributed on the inner wall of the liquid inlet channel of the sampling bottle above the liquid outlet hole, and the upper ends of the two arc-shaped limit grooves are respectively connected to a vertical inlet and outlet groove, and the two vertical inlet and outlet grooves are symmetrically distributed and connected to one side of the corresponding arc-shaped limit groove; a circular slider is arranged at the lower end of the control rod, and two symmetrically distributed limit convex balls are arranged on the outer wall of the circular slider, and the two limit convex balls can be respectively inserted into the arc-shaped limit grooves along the two vertical inlet and outlet grooves.

[0012] As a preferred technical solution in the present invention, an annular sealing plug connected to the upper end of the circular slider is fixed on the control rod. When the liquid outlet control component is sealed, the annular sealing plug is matched and sealed at the upper end of the first through hole. The sampling bottle is also provided with a control rod through-hole for facilitating the upper end of the control rod to pass through to the outside thereof, and a second sealing ring is provided between the middle part of the control rod and the inner wall of the control rod through-hole.

[0013] As a preferred technical solution in the present invention, the sampling bottle includes a tube body and a tube cover, a sampling bottle mounting groove is arranged on the upper part of the sampling pipeline, the tube body is threadedly connected to the sampling bottle mounting groove, the upper end of the tube cover is open, and the tube cover is threadedly connected to the tube body; an upwardly extending operating tube is arranged in the middle part of the tube cover, the outer wall of the operating tube is a polygonal structure that is convenient for adjustment by a wrench, and the control rod passes through the operating tube to the outside of the tube cover.

[0014] As a preferred technical solution in the present invention, the sampling bottle also includes a tube cover limiting ring, which is installed on the upper end of the tube body and threadedly connected to the outer wall of the tube body, and the upper part of the operating tube passes through the center hole of the tube cover limiting ring; an internal limiting ring is provided on the inner wall of the middle part of the tube body, and the tube cover is threadedly connected between the internal limiting ring and the tube cover limiting ring.

[0015] As a preferred technical solution in the present invention, a limit plate is provided at the upper end of the control rod, the diameter of the limit plate is larger than the inner diameter of the operating tube, and a stepped sealing plug with a diameter gradually decreasing from top to bottom is provided at the lower end of the limit plate, and the stepped sealing plug can match and seal with the upper end of the operating tube.

[0016] As a preferred technical solution in the present invention, an anti-operation installation cover is provided at the upper end of the sampling pipe, the anti-operation installation cover is threadedly connected to the outer wall of the sampling pipe, and the anti-operation installation cover is provided outside the sampling bottle and the control rod.

[0017] Beneficial effects: The present invention provides a new plate heat exchanger sampling and measuring device, in which the sampling bottle is installed on the sampling pipe. When sampling, the control rod is used to directly control the action of the liquid outlet control component so that the liquid can directly enter the sampling bottle, and the liquid will not contact the air and the dust in the air. After the sampling is completed, the control rod is used to reversely control the liquid outlet control component to continue to block the sampling pipe, and the sampling bottle can be removed. At the same time, the control rod can be used to block the sampling bottle to ensure the sealing of the sampling bottle. The liquid can be prevented from contacting the air and the dust in the air during the whole process, thereby ensuring accurate detection in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a partial structural cross-sectional view of the present invention;

[0020] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0021] Figure 4 It is a schematic diagram of the invention when drawing liquid into a sampling tube;

[0022] Figure 5 This is a schematic diagram of the present invention after the sampling tube is removed from the sampling pipeline;

[0023] Figure 6 for Figure 5 Schematic diagram of the enlarged portion B.

[0024] In the figure: 1-plate heat exchanger; 101-inlet pipe; 102-outlet pipe; 2-sampling pipe; 3-sampling bottle; 301-tube body; 302-tube cover; 303-tube cover limiting ring; 304-internal limiting ring; 4-control rod; 401-circular slider; 402-limiting convex ball; 403-annular sealing plug; 404-step sealing plug; 5-liquid outlet plate; 501-arc-shaped limiting groove; 502-vertical inlet and outlet groove; 6-liquid inlet pipe; 7-first sealing ring; 8-second sealing ring; 9-anti-operation installation cover. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0026] Example:

[0027] like Figure 1-Figure 6 As shown, this embodiment provides a plate heat exchanger sampling and measuring device, including a sampling pipe 2 connected to the upper end of the inlet pipe 101 and / or the outlet pipe 102 of the plate heat exchanger 1, so as to facilitate sampling with the help of the sampling pipe 2 without affecting the normal operation of the inlet pipe 101 and / or the outlet pipe 102. A sealed liquid outlet control component is installed at the lower end of the sampling pipe 2. Normally, the liquid outlet control component seals the inlet of the sampling pipe 2 to prevent liquid from entering the sampling pipe 2. A sampling bottle liquid inlet channel is provided on the liquid outlet control component. A sampling bottle 3 is detachably installed at the upper end of the sampling pipe 2. The upper end of the liquid outlet control component is plugged into the sampling bottle 3 to allow the sampling bottle liquid inlet channel to be The outlet of the channel is connected to the interior of the sampling bottle 3 to complete the collection of liquid; the upper end of the sampling bottle 3 is sealed with a control rod 4, which is convenient for operating the control rod 4 and ensures the sealing between the control rod 4 and the sampling bottle 3. The lower end of the control rod 4 extends into the sampling bottle 3 and is detachably connected to the upper end of the liquid outlet control component, so as to control the action of the liquid outlet control component through the control rod 4, thereby allowing the liquid in the inlet pipe 101 and / or the outlet pipe 102 to enter the corresponding sampling bottle 3 through the sampling bottle liquid inlet channel, thereby realizing the collection of liquid, and after the liquid collection is completed, when the sampling bottle 3 is taken out of the sampling pipe 2, the control rod 4 cooperates to seal the sampling bottle 3 to prevent the liquid in the sampling bottle 3 from flowing out.

[0028] The present invention provides a novel sampling and measuring device for a plate heat exchanger. The sampling bottle 3 is installed on the sampling pipe 2. When sampling, the control rod 4 is used to directly control the action of the liquid outlet control component so that the liquid can directly enter the sampling bottle 3 without contacting the air and the dust in the air. After the sampling is completed, the control rod 4 is used to reversely control the liquid outlet control component to continue to block the sampling pipe 2, so that the sampling bottle 3 can be removed. At the same time, the control rod 4 can be used to block the sampling bottle 3 to ensure the sealing of the sampling bottle 3. In the whole process, the effect of preventing the liquid from contacting the air and the dust in the air can be achieved, thereby ensuring accurate detection in the later stage.

[0029] As a preferred implementation scheme in this embodiment, it needs to be further explained that the liquid outlet control component includes a liquid outlet plate 5 and a liquid inlet pipe 6 arranged at the upper end of the liquid outlet plate 5, and the liquid outlet plate 5 is evenly distributed with a plurality of liquid inlet holes located below the control rod 4, the upper end of the liquid inlet pipe 6 passes through the lower end of the sampling bottle 3 and is plugged into the interior of the sampling bottle 3, the lower end of the liquid inlet pipe 6 is sealed with the middle part of the liquid outlet plate 5, a sealing ring is fixed on the outer wall of the lower end of the liquid inlet pipe 6, and the sealing ring and all the liquid inlet holes on the liquid outlet plate 5 are sealed, and then in the liquid inlet pipe 6 When in contact with the liquid outlet plate 5, there is no gap between the two, which can prevent liquid from entering the sampling bottle 3; the upper end of the liquid inlet tube 6 is detachably connected to the lower end of the control rod 4, and the liquid inlet tube 6 can be controlled by the control rod 4 to move away from or close to the liquid outlet plate 5. When the liquid inlet tube 6 is away from the liquid outlet plate 5 and a middle flow cavity is formed between the two, the liquid inlet tube 6, the middle flow cavity and all the liquid inlet holes cooperate to form the sampling bottle liquid inlet channel, so that the liquid can enter the sampling bottle 3 along the liquid inlet holes, the middle flow cavity and the liquid inlet tube 6 in sequence.

[0030] As a preferred implementation scheme in this embodiment, it needs to be further explained that a liquid inlet cavity is provided at the lower end of the sampling pipe 2, a liquid outlet plate 5 is fixed at the lower end of the liquid inlet cavity, and a sealing ring is threadedly connected to the liquid inlet cavity, so that the stability of the liquid inlet pipe 6 can be ensured, so that the liquid inlet pipe 6 can only be adjusted by manipulation; a first sealing ring 7 installed on the upper end of the sealing ring is provided on the outside of the liquid inlet pipe 6 to further enhance the sealing performance.

[0031] As a preferred implementation scheme in this embodiment, it needs to be further explained that a conical mounting cavity with an inner diameter gradually decreasing from top to bottom is provided in the middle of the sampling pipe 2, and the lower end of the conical mounting cavity is matched and connected with the upper end of the liquid inlet channel of the sampling bottle, and the sampling bottle 3 is installed at the upper end of the conical mounting cavity, so that the liquid inlet pipe 6 can be loaded and unloaded more conveniently.

[0032] As a preferred implementation scheme in this embodiment, it needs to be further explained that a first through hole is opened at the lower end of the sampling pipe 2, the upper end of the liquid outlet control component (such as the upper end of the liquid inlet pipe 6 mentioned above) matches and passes through the first through hole, and a plurality of liquid outlet holes connected to the interior of the sampling bottle 3 are arranged on the side wall of the upper end of the liquid outlet control component, and all the liquid outlet holes are located below the control rod 4, so that the liquid entering the liquid outlet control component can enter the sampling bottle 3 through the liquid outlet holes; two arc-shaped limiting grooves 501 are symmetrically distributed on the inner wall of the liquid inlet channel of the sampling bottle above the liquid outlet holes, and the upper ends of the two arc-shaped limiting grooves 501 are each connected to a vertical inlet and outlet Groove 502, the two vertical entry and exit grooves 502 are symmetrically distributed and connected with one side of the corresponding arc-shaped limiting groove 501 to form a similar L-shaped groove channel; a circular slider 401 is provided at the lower end of the control rod 4, and two symmetrically distributed limiting convex balls 402 are provided on the outer wall of the circular slider 401. The two limiting convex balls 402 can be respectively drawn into the arc-shaped limiting groove 501 along the two vertical entry and exit grooves 502, and then the control rod 4 is rotated to make the limiting convex balls 402 move away from the vertical entry and exit grooves 502, so as to realize the limiting connection between the control rod 4 and the liquid outlet control component, and the adjustment of the liquid outlet control component can also be realized by manipulating the control rod 4.

[0033] As a preferred implementation scheme in this embodiment, it needs to be further explained that an annular sealing plug 403 connected to the upper end of the circular slider 401 is also fixed on the control rod 4. When the liquid outlet control component is sealed (that is, when the liquid outlet plate 5 mentioned above is in contact with the liquid inlet pipe 6), the annular sealing plug 403 is matched and sealed at the upper end of the first through hole. At this time, when the sampling bottle 3 is taken down, the liquid in the sampling bottle 3 can be prevented from leaking out; the sampling bottle 3 is also provided with a control rod through-hole for facilitating the upper end of the control rod 4 to penetrate to the outside thereof, and a second sealing ring 8 is provided between the middle part of the control rod 4 and the inner wall of the control rod through-hole, which can ensure the sealing of the upper part at all times, thereby preventing the liquid in the sampling bottle 3 from leaking out.

[0034] As a preferred implementation scheme in this embodiment, it needs to be further explained that the sampling bottle 3 includes a tube body 301 and a tube cover 302, a sampling bottle mounting groove is provided on the upper part of the sampling pipe 2, the tube body 301 is threadedly connected to the sampling bottle mounting groove, the upper end of the tube cover 302 is open, and the tube cover 302 is threadedly connected to the tube body 301; an upwardly extending operating tube is provided in the middle part of the tube cover 302, the outer wall of the operating tube is a polygonal structure that is convenient for adjustment by a wrench, and the control rod 4 passes through the operating tube to the outside of the tube cover 302. In practice, if the space between the tube cover 302 and the inner bottom surface of the tube body 301 is a solution cavity, before the solution is collected, the tube cover 302 is adjusted downward as much as possible. When the solution needs to be collected, the tube cover 302 can be adjusted upward, so that the space of the solution cavity becomes larger, and the internal pressure will become smaller, thereby prompting the external solution to enter the solution cavity of the sampling bottle 3 more effectively.

[0035] As a preferred implementation scheme in this embodiment, it needs to be further explained that the sampling bottle 3 also includes a tube cover limiting ring 303, which is installed at the upper end of the tube body 301 and is threadedly connected to the outer wall of the tube body 301, and the upper part of the operating tube passes through the center hole of the tube cover limiting ring 303, so as to facilitate rotating the operating tube by a wrench, etc., thereby realizing the position adjustment of the tube cover 302 in the tube body 301, and the tube cover limiting ring 303 can prevent the tube cover 302 from being accidentally screwed out of the tube body 301; an internal limiting ring 304 is arranged on the inner wall of the middle part of the tube body 301, and the tube cover 302 is threadedly connected between the internal limiting ring 304 and the tube cover limiting ring 303, so as to prevent the tube cover 302 from being screwed too deeply into the tube body 301, thereby affecting the operation of the tube cover 302.

[0036] As a preferred implementation scheme in this embodiment, it needs to be further explained that a limiting disk is provided at the upper end of the control rod 4, the diameter of the limiting disk is larger than the inner diameter of the operating tube, and a stepped sealing plug 404 with a diameter gradually decreasing from top to bottom is provided at the lower end of the limiting disk, and the stepped sealing plug 404 can match and seal with the upper end of the operating tube, thereby further enhancing the sealing performance. Preferably, the annular sealing plug 403 can achieve sealing synchronously with the stepped sealing plug 404.

[0037] As a preferred implementation scheme in this embodiment, it needs to be further explained that an anti-operation mounting cover 9 is provided at the upper end of the sampling pipe 2, and the anti-operation mounting cover 9 is threadedly connected to the outer wall of the sampling pipe 2, and the anti-operation mounting cover 9 is covered outside the sampling bottle 3 and the control rod 4, thereby avoiding misoperation and also preventing the internal structure from being damaged or contaminated.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plate heat exchanger sampling and measuring device, characterized in that: The invention comprises a sampling pipe (2) connected to the upper end of an inlet pipe (101) and / or an outlet pipe (102) of a plate heat exchanger (1); a sealed liquid outlet control component is installed at the lower end of the sampling pipe (2); a sampling bottle liquid inlet channel is provided on the liquid outlet control component; a sampling bottle (3) is detachably installed at the upper end of the sampling pipe (2); the upper end of the liquid outlet control component is plugged into the sampling bottle (3) so that the outlet of the sampling bottle liquid inlet channel is connected to the interior of the sampling bottle (3); A control rod (4) is sealedly mounted on the upper end of the sample bottle (3); the lower end of the control rod (4) extends into the sample bottle (3) and is detachably connected to the upper end of the liquid outlet control assembly, so that the liquid outlet control assembly can be controlled by the control rod (4) to allow the liquid in the inlet pipe (101) and / or the outlet pipe (102) to enter the corresponding sample bottle (3) through the sample bottle liquid inlet channel, and cooperates to seal the sample bottle (3) when the sample bottle (3) is taken out of the sample pipe (2); A first through hole is provided at the lower end of the sampling pipe (2), and the upper end of the liquid outlet control component matches and penetrates the first through hole, and a plurality of liquid outlet holes connected to the interior of the sampling bottle (3) are provided on the side wall of the upper end of the liquid outlet control component, and all the liquid outlet holes are located below the control rod (4); two arc-shaped limiting grooves (501) are symmetrically distributed on the inner wall of the liquid inlet channel of the sampling bottle above the liquid outlet holes, and the upper ends of the two arc-shaped limiting grooves (501) are respectively connected to a vertical inlet and outlet groove (502), and the two vertical inlet and outlet grooves (502) are connected to the inner wall of the liquid inlet channel of the sampling bottle above the liquid outlet holes. The grooves (502) are symmetrically distributed and communicate with one side of the corresponding arc-shaped limiting groove (501); a circular slider (401) is provided at the lower end of the control rod (4), and two symmetrically distributed limiting convex balls (402) are provided on the outer wall of the circular slider (401), and the two limiting convex balls (402) can be respectively inserted into the arc-shaped limiting groove (501) along two vertical entry and exit grooves (502); the sampling bottle (3) is also provided with a control rod through hole for facilitating the upper end of the control rod (4) to penetrate to the outside thereof.

2. A plate heat exchanger sampling and measuring device according to claim 1, characterized in that: The liquid outlet control assembly comprises a liquid outlet plate (5) and a liquid inlet pipe (6) arranged at the upper end of the liquid outlet plate (5); a plurality of liquid inlet holes are evenly distributed on the liquid outlet plate (5) and are located below the control rod (4); the upper end of the liquid inlet pipe (6) passes through the lower end of the sampling bottle (3) and is plugged into the interior of the sampling bottle (3); the lower end of the liquid inlet pipe (6) cooperates with the middle part of the liquid outlet plate (5) for sealing; a sealing ring is fixed on the outer wall of the lower end of the liquid inlet pipe (6); the sealing ring cooperates with all the liquid inlet holes on the liquid outlet plate (5) for sealing; the upper end of the liquid inlet pipe (6) is detachably connected to the lower end of the control rod (4), and the liquid inlet pipe (6) can be controlled by the control rod (4) to move away from or close to the liquid outlet plate (5); when the liquid inlet pipe (6) is away from the liquid outlet plate (5) and a middle flow cavity is formed between the two, the liquid inlet pipe (6), the middle flow cavity and all the liquid inlet holes cooperate to form the liquid inlet channel of the sampling bottle.

3. A plate heat exchanger sampling and measuring device according to claim 2, characterized in that: The lower end of the sampling pipe (2) is provided with a liquid inlet cavity, a liquid outlet plate (5) is fixed to the lower end of the liquid inlet cavity, and a sealing ring is threadedly connected in the liquid inlet cavity; a first sealing ring (7) installed on the upper end of the sealing ring is provided outside the liquid inlet pipe (6).

4. A plate heat exchanger sampling and measuring device according to claim 2, characterized in that: A conical installation cavity with an inner diameter that gradually decreases from top to bottom is provided in the middle of the sampling pipe (2); the lower end of the conical installation cavity is matched and connected with the upper end of the sampling bottle liquid inlet channel; and the sampling bottle (3) is installed at the upper end of the conical installation cavity.

5. A plate heat exchanger sampling and measuring device according to any one of claims 1 to 4, characterized in that: The control rod (4) is also fixed with an annular sealing plug (403) connected to the upper end of the circular slider (401); when the liquid outlet control component is sealed, the annular sealing plug (403) matches and seals the upper end of the first through hole; a second sealing ring (8) is provided between the middle of the control rod (4) and the inner wall of the control rod outlet hole.

6. A plate heat exchanger sampling and measuring device according to any one of claims 1 to 4, characterized in that: The sampling bottle (3) comprises a tube body (301) and a tube cover (302); a sampling bottle mounting groove is arranged at the upper part of the sampling pipeline (2); the tube body (301) is threadedly connected to the sampling bottle mounting groove; the upper end of the tube cover (302) is open; the tube cover (302) is threadedly connected to the tube body (301); an operating tube extending upward is arranged at the middle part of the tube cover (302); the outer wall of the operating tube is a polygonal structure that is convenient for adjustment by a wrench; the control rod (4) passes through the operating tube to the outside of the tube cover (302).

7. A plate heat exchanger sampling and measuring device according to claim 6, characterized in that: The sampling bottle (3) further comprises a tube cover limiting ring (303), which is installed at the upper end of the tube body (301) and is threadedly connected to the outer wall of the tube body (301), and the upper part of the operating tube passes through the central hole of the tube cover limiting ring (303); an internal limiting ring (304) is arranged on the inner wall of the middle part of the tube body (301), and the tube cover (302) is threadedly connected between the internal limiting ring (304) and the tube cover limiting ring (303).

8. A plate heat exchanger sampling and measuring device according to claim 7, characterized in that: The upper end of the control rod (4) is provided with a limit plate, the diameter of which is larger than the inner diameter of the operating tube, and the lower end of the limit plate is provided with a stepped sealing plug (404) whose diameter gradually decreases from top to bottom, and the stepped sealing plug (404) can match and seal with the upper end of the operating tube.

9. A plate heat exchanger sampling and measuring device according to any one of claims 1 to 4, characterized in that: An anti-operation mounting cover (9) is provided at the upper end of the sampling pipe (2), the anti-operation mounting cover (9) is threadedly connected to the outer wall of the sampling pipe (2), and the anti-operation mounting cover (9) is arranged outside the sampling bottle (3) and the control rod (4).

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