Low-concentration particulate matter sampling head convenient to replace

Abstract

The utility model discloses a low-concentration particulate matter sampling head convenient to replace, which relates to the technical field of particulate matter cutters and comprises a sampling component, the sampling component comprises a base, a bent pipe is fixed at the top end of the base, a connecting component is arranged at one end of the bent pipe far away from the base, and supporting components are fixedly connected to two sides of the surface of the base. The connecting assembly comprises a rotating shaft rotationally connected to the end of the surface of the bent pipe. According to the utility model, the rotary knob is rotated to enable the rotating shaft to wind the two groups of cords, so that the cords pull the clamping block to move, the clamping block extrudes the spring and is separated from the clamping groove when moving to release the fixation of the sampling nozzle, and then the sampling nozzle is pulled out to be replaced, the replaced sampling nozzle is inserted into the bent pipe, and the rotary knob is loosened; the clamping block drives the rope to reset under the counter-acting force of the spring and is re-embedded into the clamping groove to fix the sampling nozzle, so that the sampling nozzles with different calibers can be effectively and quickly replaced by a worker, and the sampling efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of particle cutters, in particular to a low-concentration particle sampling head which is easy to replace. Background Art

[0002] In accordance with the "Determination of Particle Matter in Exhaust Gas from Stationary Pollution Sources and Sampling Methods for Gaseous Pollutants" GB / T16157-1996, when using the isokinetic sampling method to collect particulate matter in exhaust gas from fixed pollution sources, the specifications of the sampling nozzle to be used must be determined based on the flue gas flow rate of the fixed pollution source.

[0003] An existing patent (publication number: CN 209542204 U) discloses a low-concentration particulate matter sampling head with switchable caliber. The front pipe opening of the sampling head adopts an internal thread design, so that sampling nozzles of different calibers can be switched. When sampling on site, sampling nozzles of different calibers can be switched according to needs to meet various experimental needs, eliminating the need for the laboratory to prepare a large number of sampling heads due to different caliber specifications of sampling nozzles before sampling.

[0004] However, the above technical solution still has certain defects. The device replaces sampling nozzles of different calibers by threadedly connecting the sampling nozzle and the pipe mouth. However, when replacing, the staff needs to repeatedly twist the sampling nozzle to remove and replace it. The process is too cumbersome and affects the work efficiency of the staff to a certain extent. Therefore, a low-concentration particulate matter sampling head that is easy to replace is proposed. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a low-concentration particulate matter sampling head that is easy to replace, so as to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-concentration particulate matter sampling head that is easy to replace, including a sampling assembly, the sampling assembly includes a base, a curved pipe is fixed to the top of the base, a connecting assembly is provided at the end of the curved pipe away from the base, and support assemblies are fixedly connected to both sides of the base surface.

[0007] As an optimal technical solution for a low-concentration particulate matter sampling head that is easy to replace in the utility model, the connecting assembly includes a rotating shaft rotatably connected to the end of the curved pipe surface, and ropes are fixedly connected to the upper and lower ends of the rotating shaft surface, and the rope surface is provided with a first guide shaft for changing its extension direction, and a second guide shaft for changing the extension direction of the rope is provided on one side of the first guide shaft, and the front and rear ends of the second guide shaft are fixedly connected to vertical plates, and fixed plates are welded to the bottom ends of the two groups of vertical plates, and a clamping block is connected to the end of the rope away from the rotating shaft, and a spring sleeved on the rope surface is provided between the clamping block and the fixed plate.

[0008] As an optimal technical solution for a low-concentration particulate sampling head that is easy to replace in the utility model, the support assembly includes fixed blocks fixedly connected to both sides of the base surface, and the two groups of fixed blocks are slidably connected to the inside of a first telescopic plate, the inner wall of the first telescopic plate is slidably connected to a second telescopic plate, and the end of the first telescopic plate away from the fixed block is fixedly connected to a circular shaft.

[0009] As an optimal technical solution for a low-concentration particulate matter sampling head that is easy to replace in the utility model, a filter membrane is provided at the bottom end of the inner wall of the base, a stainless steel support net is provided at the bottom end of the filter membrane, a sealing pressure ring is provided at the bottom end of the stainless steel support net, and a sampling nozzle is slidably connected to the end of the curved pipe away from the base, and a slot for a matching card block is provided in the sampling nozzle.

[0010] As a preferred technical solution for a low-concentration particulate sampling head that is easy to replace in the utility model, a knob is welded on the end of the rotating shaft away from the rope, and the end of the rope passes through a fixed plate and is fixedly connected to a clamping block.

[0011] As a preferred technical solution of the utility model for a low-concentration particulate sampling head that is easy to replace, a slide groove is provided inside the second telescopic plate, and the circular shaft is slidably connected to the second telescopic plate through the slide groove.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] 1. The utility model rotates the knob to make the rotating shaft reel in the two sets of wires, so that the wires pull the card block to move. When the card block moves, it squeezes the spring and disengages from the card slot, releasing the fixation of the sampling nozzle. The sampling nozzle is then pulled out for replacement, and the replaced sampling nozzle is inserted into the bent pipe. The knob is loosened, and the card block drives the wires to reset and re-embed into the card slot under the reaction force of the spring to fix the sampling nozzle. This effectively enables the staff to quickly replace sampling nozzles of different calibers, thereby effectively improving the sampling efficiency.

[0014] 2. The utility model pulls the second telescopic plates on both sides, and when the second telescopic plates are moved out, the first telescopic plates are driven to move. When the plates are moved to a limited position, the second telescopic plates are rotated to ninety degrees so that the second telescopic plates on both sides support and connect with the platform, which can effectively expand the support area of ​​the device, further enhance the stabilization effect of the sampling device, and enable the sampling device to perform sampling better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall components of the utility model;

[0016] Figure 2 It is a schematic diagram of the sampling component of the utility model;

[0017] Figure 3It is a schematic diagram of the connection assembly of the utility model;

[0018] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 It is a schematic diagram of the support assembly of the utility model.

[0020] In the figure: 100, sampling assembly; 110, base; 120, elbow; 130, filter membrane; 140, stainless steel support net; 150, sealing pressure ring; 160, sampling nozzle; 161, card slot;

[0021] 200, connecting assembly; 210, rotating shaft; 211, knob; 220, rope; 230, first guide shaft; 240, second guide shaft; 241, vertical plate; 250, fixing plate; 260, block; 270, spring;

[0022] 300, support assembly; 310, fixed block; 320, first telescopic plate; 330, second telescopic plate; 331, slide groove; 340, round shaft. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0024] The following describes an embodiment of the utility model based on its overall structure.

[0025] An easily replaceable low-concentration particulate sampling head, such as Figure 1-5 As shown, it includes a sampling component 100, which includes a base 110. A curved tube 120 is fixed on the top of the base 110. A connecting component 200 is provided at one end of the curved tube 120 away from the base 110. Support components 300 are fixedly connected to both sides of the surface of the base 110. The connecting component 200 includes a rotating shaft 210 rotatably connected to the end of the curved tube 120 surface. A wire rope 220 is fixedly connected to both upper and lower ends of the rotating shaft 210 surface. A first guide shaft 230 for changing the extension direction of the wire rope 220 is provided on the surface of the wire rope 220. A second guide shaft 240 for changing the extension direction of the wire rope 220 is provided on one side of the first guide shaft 230. Vertical plates 241 are fixedly connected to the front and rear ends of the second guide shaft 240. Fixed plates 250 are welded to the bottom ends of the two groups of vertical plates 241. A clamping block 260 is connected to one end of the wire rope 220 away from the rotating shaft 210. A spring 270 sleeved on the surface of the wire rope 220 is provided between the clamping block 260 and the fixed plate 250.

[0026] When the staff needs to replace the sampling nozzle 160 for sampling, the staff turns the knob 211 to make the rotating shaft 210 reel in the two sets of ropes 220, so that the ropes 220 pull the block 260 to move under the action of the first guide shaft 230 and the second guide shaft 240. When the block 260 moves, it squeezes the spring 270 and disengages from the slot 161, thereby releasing the fixation of the sampling nozzle 160. The sampling nozzle 160 is then pulled out for replacement, and the replaced sampling nozzle 160 is inserted into the bent pipe 120. The knob 211 is loosened, and the reaction force of the spring 270 drives the block 260 to reset and re-embed the rope 220 into the slot 161 to fix the sampling nozzle 160. This effectively enables the staff to quickly replace sampling nozzles 160 of different calibers, thereby effectively improving the sampling efficiency.

[0027] Please refer to Figure 1 and Figure 5 The support assembly 300 includes fixed blocks 310 fixedly connected to both sides of the surface of the base 110, and the first telescopic plates 320 are slidably connected inside the two sets of fixed blocks 310. The second telescopic plates 330 are slidably connected to the inner wall of the first telescopic plates 320, and the round shaft 340 is fixedly connected to one end of the first telescopic plates 320 away from the fixed blocks 310.

[0028] The staff pulls the second telescopic plates 330 on both sides, and when the second telescopic plates 330 are moved out, they drive the first telescopic plates 320 to move. When they move to the limited position, the staff rotates the second telescopic plates 330 to ninety degrees so that the second telescopic plates 330 on both sides support the platform, which can effectively expand the support area of ​​the device, further enhance the stability of the sampling device, and enable the sampling device to better perform sampling.

[0029] Please refer to Figure 2 , Figure 3 and Figure 4 A filter membrane 130 is provided at the bottom end of the inner wall of the base 110, a stainless steel support net 140 is provided at the bottom end of the filter membrane 130, a sealing pressure ring 150 is provided at the bottom end of the stainless steel support net 140, and a sampling nozzle 160 is slidably connected to the end of the curved pipe 120 away from the base 110, and a slot 161 for matching the block 260 is provided in the sampling nozzle 160, a knob 211 is welded to the end of the rotating shaft 210 away from the rope 220, and the end of the rope 220 passes through the fixed plate 250 and is fixedly connected to the block 260.

[0030] Through the cooperation between the clamping block 260 and the clamping slot 161 in the sampling nozzle 160 , the sampling nozzle 160 can be effectively fixed, so as to facilitate sampling.

[0031] Please refer to Figure 5 A sliding groove 331 is provided inside the second telescopic plate 330 , and the circular shaft 340 is slidably connected to the second telescopic plate 330 through the sliding groove 331 .

[0032] The circular shaft 340 is provided to enable the second telescopic plate 330 to rotate when it moves to a certain position, and the second telescopic plates 330 on both sides are supported on the platform.

[0033] When in use, the staff pulls the second telescopic plates 330 on both sides, and the second telescopic plates 330 move out to drive the first telescopic plates 320 to move. When moving to the limited position, the second telescopic plates 330 are rotated to ninety degrees, so that the second telescopic plates 330 on both sides support and the platform, which can effectively expand the support area of ​​the device, further enhance the stability of the sampling device, and enable the sampling device to perform sampling better. When the staff needs to replace the sampling nozzle 160 for sampling, the rotating shaft 210 reels the two sets of ropes 220 by turning the knob 211, so that the ropes 220 are reeled in between the first guide shaft 230 and the second guide shaft 240. Under the action of , the card block 260 is pulled to move. When the card block 260 moves, the spring 270 is squeezed and disengaged from the card slot 161, thereby releasing the fixation of the sampling nozzle 160. The sampling nozzle 160 is then pulled out for replacement, and the replaced sampling nozzle 160 is inserted into the bent pipe 120. The knob 211 is loosened, and the card block 260 drives the rope 220 to reset and re-embed the card slot 161 under the reaction force of the spring 270 to fix the sampling nozzle 160. This effectively enables the staff to quickly replace sampling nozzles 160 of different calibers, thereby effectively improving the sampling efficiency. The parts not involved in the device are the same as the prior art or can be implemented using the prior art.

[0034] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. A low-concentration particulate matter sampling head that is easy to replace, comprising a sampling assembly (100), characterized in that: The sampling assembly (100) comprises a base (110), a curved tube (120) is fixed at the top of the base (110), a connecting assembly (200) is provided at one end of the curved tube (120) away from the base (110), supporting assemblies (300) are fixedly connected to both sides of the surface of the base (110), the connecting assembly (200) comprises a rotating shaft (210) rotatably connected to the end of the surface of the curved tube (120), a wire rope (220) is fixedly connected to both upper and lower ends of the surface of the rotating shaft (210), a first guide shaft (230) for changing the extension direction of the wire rope (220) is provided on the surface of the wire rope (220), a second guide shaft (240) for changing the extension direction of the wire rope (220) is provided on one side of the first guide shaft (230), and the second guide shaft (240) for changing the extension direction of the wire rope (220) is provided on one side of the first guide shaft (230), and the second guide shaft (24 0) The front and rear ends are fixedly connected with vertical plates (241), and the bottom ends of the two groups of vertical plates (241) are welded with fixed plates (250), and the end of the rope (220) away from the rotating shaft (210) is connected with a clamping block (260), and a spring (270) sleeved on the surface of the rope (220) is provided between the clamping block (260) and the fixed plate (250), and the support assembly (300) includes fixed blocks (310) fixedly connected to both sides of the surface of the base (110), and the two groups of fixed blocks (310) are slidably connected with the first telescopic plate (320) inside, and the inner wall of the first telescopic plate (320) is slidably connected with the second telescopic plate (330), and the end of the first telescopic plate (320) away from the fixed block (310) is fixedly connected with a round shaft (340).

2. The easily replaceable low-concentration particulate matter sampling head according to claim 1, characterized in that: A filter membrane (130) is provided at the bottom end of the inner wall of the base (110), a stainless steel support net (140) is provided at the bottom end of the filter membrane (130), a sealing pressure ring (150) is provided at the bottom end of the stainless steel support net (140), and a sampling nozzle (160) is slidably connected to one end of the curved pipe (120) away from the base (110), and a card slot (161) that matches the card block (260) is provided in the sampling nozzle (160).

3. The easily replaceable low-concentration particulate matter sampling head according to claim 2, characterized in that: A knob (211) is welded to one end of the rotating shaft (210) away from the wire rope (220), and the end of the wire rope (220) passes through the fixing plate (250) and is fixedly connected to the clamping block (260).

4. The easily replaceable low-concentration particulate matter sampling head according to claim 3, characterized in that: A sliding groove (331) is provided inside the second telescopic plate (330), and the circular shaft (340) is slidably connected to the second telescopic plate (330) via the sliding groove (331).

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