Large-caliber low-temperature stop valve

Abstract

The utility model relates to a large-caliber low-temperature stop valve, which belongs to the technical field of stop valves and comprises a stop valve body, the left side of the stop valve body is communicated with a water inlet pipe, the right side of the stop valve body is communicated with a water outlet pipe, and a filtering structure is arranged in the water inlet pipe. The filtering structure comprises a limiting plate, a telescopic spring, a filtering plate, a sliding block and a slag discharging pipe, the limiting plate is fixedly connected to the inner wall of the water inlet pipe, the movable rod penetrates through the limiting plate and is fixedly connected with the filtering plate, the telescopic spring is arranged on the outer side of the movable rod in a sleeving mode, and the sliding block is fixedly connected to the outer side of the filtering plate. And the slag discharging pipe communicates with the lower end of the water inlet pipe, an electromagnetic valve is arranged on the slag discharging pipe, and a through hole is formed in the movable rod. The large-diameter low-temperature stop valve has the advantages that the filter structure is arranged in the stop valve, media in the stop valve can be filtered and prevented from being blocked through the filter structure, backflow can be reduced, cleanliness of a water supply pipeline is guaranteed, and it is guaranteed that discharged water is clean.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely to a large -diameter low temperature stop valve. BACKGROUND

[0002] Stop valve, also called stop door, is the most widely used valve, and it is popular because of small friction between sealing surfaces in opening and closing process, durability, small opening height, easy manufacturing, convenient maintenance, not only suitable for medium and low pressure, but also suitable for high pressure.

[0003] The closing principle of stop valve is that the valve lever pressure makes the valve clapper sealing surface and the valve seat sealing surface closely adhere, and prevents medium flow.

[0004] The large-diameter low-temperature stop valve on the market, a stop valve in the utility model CN206290731 U, although the stop valve when the stop valve rod is positive rotation, the sealing gasket is pressed on the hole edge of the water hole, when the stop valve rod is reversed, the valve core can be moved reversely and the inner end of the stop valve rod is inserted into the avoiding groove, and the cylindrical part is inserted into the avoiding hole, the stop valve makes the structure more compact on the basis of ensuring the sealing.

[0005] But because of the setting of the cylindrical part in the above comparative example, the problem of screw penetration is solved, the sealing is ensured, and the structure is compact, but when the valve core is opened and the water outlet appears backflow, the valve core cannot close the water hole, the backflow will enter the water inlet and then enter the water supply pipeline, resulting in pollution of the water supply pipeline, and thus the stop valve needs to be improved. UTILITY MODEL CONTENT

[0006] In view of the defects of the prior art, the utility model provides a large-diameter low-temperature stop valve, which has the advantages of enhanced practicality of the stop valve, and solves the problem that the stop valve needs to be improved.

[0007] To achieve the above object, the utility model provides the following technical scheme: a large-diameter low-temperature stop valve, comprising a stop valve body, a water inlet pipe is communicated on the left side of the stop valve body, a water outlet pipe is communicated on the right side of the stop valve body, and a filter structure is arranged in the water inlet pipe.

[0008] The filter structure comprises a limiting plate, a movable rod, an extension spring, a filter plate, a sliding block and a slag discharge pipe, the limiting plate is fixedly connected to the inner wall of the water inlet pipe, the movable rod penetrates through the limiting plate and is fixedly connected with the filter plate, the extension spring is sleeved on the outer side of the movable rod, the sliding block is fixedly connected to the outer side of the filter plate, and the slag discharge pipe is communicated at the lower end of the water inlet pipe.

[0009] Among them, the extension spring is fixedly connected between the limiting plate and the filter plate.

[0010] Need to explain, when liquid medium flows to the inside of the water inlet pipe, the liquid medium will be communicated through the limiting plate and the movable rod, and the medium after the flow will be filtered through the filter plate, and when the flowing medium impacts into the inside of the water inlet pipe, the movable rod is limited by the limiting plate and the telescopic spring, and the filter plate connected with the movable rod is displaced by sliding in the sliding groove through the sliding block, so that the filtering efficiency of the medium in the water inlet pipe is better, and the impurities in the medium will fall outside the filter plate, and when the filter plate slides again due to the impact force, the filtered impurities are pushed to the residue discharge pipe for treatment, to reduce the medium backflow, ensure the cleaning of the water supply pipeline, ensure the clean water and the like.

[0011] Further, the upper end of the stop valve body is fixedly connected with a stop valve rod, and the upper end of the stop valve rod is in transmission connection with a hand wheel.

[0012] Further, the lower end of the stop valve rod is fixedly connected with a valve core, and the lower end of the valve core is fixedly connected with a sealing pad.

[0013] The sealing pad can enhance the sealing performance of the valve core during connection.

[0014] Need to explain, the sealing pad is made of rubber.

[0015] Further, a sliding groove is formed in the water inlet pipe, and the sliding block slides in the water inlet pipe through the sliding groove.

[0016] The number of the sliding groove and the sliding block is two.

[0017] Further, a through hole is formed in the limiting plate, and the movable rod penetrates through the limiting plate through the through hole.

[0018] Further, an electromagnetic valve is arranged on the residue discharge pipe.

[0019] Further, a through hole is formed in the movable rod.

[0020] The movable rod is a through hole that can cooperate with the limiting plate to water.

[0021] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0022] The large-diameter low-temperature stop valve has the advantages that the filter structure is arranged in the stop valve, the filter structure can not only filter and prevent blockage of the medium in the stop valve, but also can reduce backflow, ensure the cleaning of the water supply pipeline, ensure the clean water and the like. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is a sectional view of the overall structure of the present application;

[0024] Fig. 2 The enlarged structure schematic view of the utility model A place;

[0025] Fig. 3 The utility model activity rod structure perspective drawing.

[0026] In the drawing: 1, stop valve body;2, stop valve stem;3, hand wheel;4, water inlet pipe;5, water outlet pipe;6, valve core;7, limit plate;8, movable rod;9, telescopic spring;10, filter plate;11, sliding block;12, sliding groove;13, deslagging pipe. Specific implementation

[0027] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figs. 1 to 3 The utility model discloses a large-diameter low-temperature stop valve, which comprises a stop valve body 1, a water inlet pipe 4 is communicated to the left side of the stop valve body 1, a water outlet pipe 5 is communicated to the right side of the stop valve body 1, and a filter structure is arranged in the water inlet pipe 4.

[0029] The filter structure comprises a limit plate 7, a movable rod 8, a telescopic spring 9, a filter plate 10, a sliding block 11 and a deslagging pipe 13, the limit plate 7 is fixedly connected to the inner wall of the water inlet pipe 4, the movable rod 8 penetrates through the limit plate 7 and is fixedly connected with the filter plate 10, the telescopic spring 9 is sleeved outside the movable rod 8, the sliding block 11 is fixedly connected to the outer side of the filter plate 10, and the deslagging pipe 13 is communicated to the lower end of the water inlet pipe 4.

[0030] Among them, the telescopic spring 9 is fixedly connected between the limit plate 7 and the filter plate 10.

[0031] It should be noted that when the liquid medium flows into the water inlet pipe 4, the liquid medium can be communicated through the limit plate 7 and the movable rod 8, and the filtered medium can be filtered through the filter plate 10, and when the flowing medium impacts into the water inlet pipe 4, the movable rod 8 can be limited through the limit plate 7 and the telescopic spring 9, and the filter plate 10 connected with the movable rod 8 can be displaced by sliding in the sliding groove 12 through the sliding block 11, so that the filtering efficiency of the medium in the water inlet pipe 4 is better, and the impurities in the medium can fall outside the filter plate 10, and when the filter plate 10 slides again due to impact force, the filtered impurities can be pushed to the deslagging pipe 13 for treatment, so as to reduce the medium backflow, ensure the cleaning of the water supply pipeline, ensure the clean water and other advantages.

[0032] The upper end of the stop valve body 1 is fixedly connected with a stop valve rod 2, and the upper end of the stop valve rod 2 is in transmission connection with a hand wheel 3.

[0033] The lower end of the stop valve rod 2 is fixedly connected with a valve core 6, and the lower end of the valve core 6 is fixedly connected with a sealing pad.

[0034] The sealing pad can enhance the sealing performance of the valve core 6 during connection.

[0035] It should be noted that the sealing pad is made of natural rubber, which has good elasticity and cold resistance.

[0036] The sliding groove 12 is provided in the water inlet pipe 4, and the sliding block 11 slides in the water inlet pipe 4 through the sliding groove 12.

[0037] The number of the sliding groove 12 and the sliding block 11 is two.

[0038] The limiting plate 7 is provided with a through hole, and the movable rod 8 penetrates the limiting plate 7 through the through hole.

[0039] The electromagnetic valve is provided on the residue discharge pipe 13.

[0040] The electromagnetic valve is an automatic control valve that uses the magnetic force generated by an electromagnetic coil to drive the valve to open or close. It is widely used in various fluid (liquid, gas) control systems, especially in situations that require remote control, automatic control or fast response.

[0041] It should be noted that the electromagnetic valve has the characteristics of fast response: the response time of the electromagnetic valve is usually very short, and the opening or closing action can be completed within a few milliseconds to a few seconds.

[0042] Simple structure: compared with other types of valves, the structure of the electromagnetic valve is relatively simple, which is convenient for installation and maintenance.

[0043] Strong reliability: the driving part of the electromagnetic valve is an electromagnetic coil, which has no mechanical wear and tear, so the service life is longer.

[0044] Wide application range: suitable for various media, including water, oil, gas, etc., and can adapt to different temperature and pressure conditions.

[0045] Convenient control: the opening and closing of the valve can be controlled by switching the current, which is easy to realize automatic control.

[0046] The movable rod 8 is provided with a through hole.

[0047] The movable rod 8 is provided with a through hole.

[0048] The working principle of the above embodiment is as follows:

[0049] Firstly, the medium in the stop valve flows through the inlet pipe 4 and the outlet pipe 5.

[0050] Secondly, the medium in the stop valve is controlled to flow through the cooperation of the stop valve rod 2, the hand wheel 3 and the valve core 6.

[0051] Finally, when the liquid medium flows into the inside of the inlet pipe 4, the liquid medium is communicated through the limiting plate 7 and the movable rod 8, and the flowed medium is filtered through the filter plate 10, and when the flowed medium impacts into the inside of the inlet pipe 4, the movable rod 8 is limited through the limiting plate 7 and the telescopic spring 9, and the filter plate 10 connected with the movable rod 8 is displaced through the sliding block 11 sliding in the sliding groove 12, so that the filtering efficiency of the medium in the inlet pipe 4 is better, and the impurities in the medium will fall outside the filter plate 10, and when the filter plate 10 slides again due to the impact force, the filtered impurities are pushed to the slag discharge pipe 13 for treatment, so as to reduce the medium backflow, ensure the cleaning of the water supply pipeline, ensure the clean water and the like.

[0052] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that comprises a list of elements does not only include those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0053] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A large-bore cryogenic stop valve comprising a stop valve body (1), characterized in that: The water inlet pipe (4) is communicated with the left side of the stop valve body (1), the water outlet pipe (5) is communicated with the right side of the stop valve body (1), and the filter structure is arranged in the water inlet pipe (4). The filter structure comprises a limiting plate (7), a movable rod (8), a telescopic spring (9), a filter plate (10), a sliding block (11) and a slag discharge pipe (13), the limiting plate (7) is fixedly connected to the inner wall of the water inlet pipe (4), the movable rod (8) penetrates through the limiting plate (7) and is fixedly connected with the filter plate (10), the telescopic spring (9) is sleeved on the outer side of the movable rod (8), the sliding block (11) is fixedly connected to the outer side of the filter plate (10), and the slag discharge pipe (13) is communicated with the lower end of the water inlet pipe (4).

2. A large-bore cryogenic stop valve according to claim 1, characterized in that: The upper end of the stop valve body (1) is fixedly connected with a stop valve rod (2), and the upper end of the stop valve rod (2) is drivingly connected with a hand wheel (3).

3. A large-bore cryogenic stop valve according to claim 2, characterized in that: The lower end of the stop valve rod (2) is fixedly connected with a valve core (6), and the lower end of the valve core (6) is fixedly connected with a sealing pad.

4. A large-bore cryogenic stop valve according to claim 1, characterized in that: A sliding groove (12) is formed in the water inlet pipe (4), and the sliding block (11) slides in the water inlet pipe (4) through the sliding groove (12).

5. A large-bore cryogenic stop valve according to claim 1, characterized in that: A through hole is formed in the limiting plate (7), and the movable rod (8) penetrates through the limiting plate (7) through the through hole.

6. A large-bore cryogenic stop valve according to claim 1, characterized in that: An electromagnetic valve is arranged on the slag discharge pipe (13).

7. A large-bore cryogenic stop valve according to claim 1, characterized in that: A through hole is formed in the movable rod (8).

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