High-sealing-performance gate valve convenient to replace

Abstract

The utility model relates to the technical field of valve bodies, and discloses a high-sealing-performance gate valve convenient to replace, which comprises a valve body, a circulation port is arranged on the valve body, a valve plate is arranged on the valve body, a fastening screw is in threaded connection with the valve plate, and the valve body is fixedly connected with the valve plate through the fastening screw. A connecting piece is fixedly connected to the valve plate, a hand wheel is rotationally connected to the connecting piece, a main threaded piece is arranged in the middle of the hand wheel, and a valve rod is in threaded connection to the main threaded piece; the valve rod detection mechanism is additionally arranged on the sealing valve, so that the overall operation safety of the valve can be effectively guaranteed; the deformation condition of the valve rod can be detected before use, and potential safety hazards can be found in time; for example, when the valve rod slightly deforms due to overload pressure and vibration factors and the detection mechanism performs detection, the first electric contact piece can have the movement blocking condition in the column cavity detection channel, and the blocking condition can indirectly remind corresponding personnel of deformation of the column cavity detection channel formed in the valve rod at the moment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve body, concretely is a high sealing gate valve convenient to replace. BACKGROUND

[0002] In industrial production and various pipeline systems, the gate valve as a key fluid cutoff device is widely used in controlling fluid on-off, however, in the long-term use process, the gate valve stem often appears deformation problem, seriously affects its normal operation and service life.

[0003] There are many factors causing the deformation of the valve stem in the pipeline system. When the pressure in the pipeline is too high, the operator forcibly operates when closing the gate valve, the valve stem will bear a huge axial force; the instantaneous impact force generated by the water hammer phenomenon also acts on the valve stem, causing its deformation; in addition, the valve stem material quality is poor, the strength and rigidity are insufficient, there are defects inside, and the position is not accurate during installation, and the valve stem is mechanically damaged, which makes the valve stem prone to deformation in work; at the same time, the vibration environment of the gate valve, the valve stem bears alternating stress due to resonance, plus the corrosion and wear of the valve stem, the strength and rigidity are reduced, which are important inducements for the deformation of the valve stem;

[0004] It is worth noting that in the prior art, there is a lack of effective monitoring measures for the deformation of the gate valve stem. At present, most of them rely on artificial regular inspection to find the deformation of the valve stem, but this method has obvious hysteresis and cannot master the state of the valve stem in real time; in the early stage of valve stem deformation, it is difficult for artificial to detect, and when it is found, it has caused serious damage to the gate valve and even the whole pipeline system; moreover, the traditional monitoring method cannot accurately predict the trend of the valve stem deformation, and it is difficult to provide a strong basis for preventive maintenance;

[0005] The deformation of the valve stem not only affects the sealing performance of the gate valve, causing fluid leakage, but also causes the gate valve to be unable to normally open and close, thereby threatening the operation safety of the whole pipeline system; therefore, it is of great significance to study the reasons for the deformation of the valve stem and explore effective monitoring and solving measures for the stable operation and prolonging the service life of the gate valve.

[0006] Therefore, we propose a high sealing gate valve convenient to replace to solve the above problems. CONTENT OF THE UTILITY MODEL

[0007] (I) technical problem solved

[0008] In view of the deficiencies of the prior art, the utility model provides a high sealing gate valve convenient to replace to solve the problems in the above background technology.

[0009] (II) technical scheme

[0010] In order to achieve the above object, the utility model provides the following technical scheme: a high sealing gate valve convenient to replace, including valve body, the valve body is opened with flow passageway, be provided with valve plate on the valve body, be provided with fastening screw on the valve plate, the valve body is connected with valve plate through fastening screw.

[0011] As preferred, the valve plate is fixedly connected with a connecting piece, the connecting piece is rotatably connected with a hand wheel, a main threaded part is arranged in the middle of the hand wheel, and a valve rod is threadedly connected to the main threaded part.

[0012] As preferred, the valve rod is fixedly connected with a gate plate at the bottom, and a first air vent hole is formed in the gate plate.

[0013] As preferred, a column cavity detection groove is formed in the valve rod, a second air vent hole is formed in the bottom of the valve rod, and the column cavity detection groove is in communication with the second air vent hole.

[0014] As preferred, a first electric contact is slidably connected in the column cavity detection groove, and a second electric contact is fixedly connected to the bottom of the inner cavity of the column cavity detection groove.

[0015] As preferred, a spring is fixedly connected to the bottom of the inner cavity of the column cavity detection groove.

[0016] (Three) beneficial effects

[0017] Compared with the prior art, the utility model provides a high sealing gate valve convenient to replace, which has the following beneficial effects:

[0018] 1. The utility model discloses a valve rod detection mechanism is additionally arranged to the sealing valve, can effectively guarantee the overall operation safety of valve, can detect the deformation of valve rod before use, can find potential safety hazard in time, for example, when the valve rod appears slight deformation because of overload pressure, vibration factor, the first electric contact in the detection mechanism will be blocked in the column cavity detection groove when detecting, and the blocking condition can indirectly remind the corresponding personnel that the column cavity detection groove in the valve rod is deformed at this time, that is, the valve rod has been deformed at this time, the above-mentioned detection can enable the operator to take effective measures before the deformation of the valve rod is further intensified, leading to the sealing failure of the gate plate, the massive leakage of fluid and even the explosion of the pipeline system, thereby greatly guaranteeing the safe operation of the whole industrial production process.

[0019] Meanwhile, through continuous monitoring of whether the valve rod is deformed before each work, the valve rod can be prevented from continuously working in a poor state; when the valve rod is detected to be deformed, timely adjustment can prevent additional wear and damage of the sealing surface of the gate plate and other components caused by the deformation of the valve rod; for example, if the valve rod is still forced to operate after being deformed, the friction between the gate plate and the valve body will be intensified, the sealing surface of the gate plate will be damaged, and the service life of the sealing valve as a whole will be shortened; and the presence of the detection assembly can ensure that the sealing valve always operates in a good working condition, thereby effectively prolonging the overall service life.

[0020] 2、The utility model discloses a valve rod is deformed during the detection of the column cavity detection channel and the cooperation of first electric contact piece can detect whether the loose or fracture of valve rod and gate plate junction, ensure system safe and stable operation, early warning serious failure. The loose or fracture of valve rod and gate plate junction will lead to the gate plate unable normal control fluid on-off, cause the uncontrolled flow of the fluid in the flow pass of valve body, in some high pressure, flammable and explosive or toxic harmful fluid delivery scene, this will bring great security risk, the column cavity detection channel can detect the connection state of valve rod and gate plate on the basis of detecting whether the valve rod is deformed, can detect when the early sign of loose or fracture appears, make the operator take measures in time, avoid the serious safety accidents such as fire explosion, environmental pollution caused by pipe burst, leakage, guarantee the safety of entire industrial production environment and personnel;

[0021] Meanwhile, maintenance cost can be reduced, and chain damage can be avoided. When the connection between the valve rod and the gate plate has a problem and is not detected in time, continued operation will cause the gate plate to abnormally swing in the flow pass, and then impact the valve body, causing damage to the valve body, and thus causing damage to other devices such as pumps and filters upstream and downstream. However, the design can detect the connection, so that the maintenance personnel can repair the problem before it worsens, prevent a small problem from becoming a big problem, and avoid a series of unnecessary maintenance and replacement costs. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an appearance drawing of the utility model;

[0023] Figure 2 It is a sectional view of the valve body, valve plate and connecting piece of the utility model;

[0024] Figure 3 It is an exploded view of the main body structure of the utility model;

[0025] Figure 4 It is a related structure diagram of the valve rod, gate plate, first electric contact piece and second electric contact piece in the utility model;

[0026] Figure 5 It is a structure diagram of the second air vent hole, first electric contact piece, second electric contact piece and spring in the utility model.

[0027] In the drawings:

[0028] 1. valve body; 101. flow port; 2. valve plate; 3. fastening screw; 4. connecting piece; 5. hand wheel; 6. valve rod; 601. main threaded part; 7. gate plate; 701. first air release hole; 8. column cavity detection channel; 9. second air release hole; 10. first electric contact; 11. second electric contact; 12. spring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. 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 those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] The utility model will be further described in detail below according to the drawings and embodiments.

[0031] EMBODIMENT

[0032] Please refer to Figures 1 to 5 As shown:

[0033] A high sealing gate valve convenient to replace, including valve body 1, be provided with flow port 101 on valve body 1, be provided with valve plate 2 on valve body 1, be provided with fastening screw 3 on valve plate 2 and be connected with screw thread, valve body 2 with valve plate 2 are connected through fastening screw 3, be provided with connecting piece 4 on valve plate 2, be provided with hand wheel 5 on connecting piece 4 and be connected with rotation, be provided with main threaded part 601 in the middle part of hand wheel 5, be provided with valve rod 6 on main threaded part 601 and be connected with screw thread, be provided with gate plate 7 on the bottom of valve rod 6, be provided with first air release hole 701 on gate plate 7, be provided with column cavity detection channel 8 on valve rod 6, be provided with second air release hole 9 on the bottom of valve rod 6, column cavity detection channel 8 with second air release hole 9 are communicated, be provided with first electric contact 10 in column cavity detection channel 8 and be connected with sliding, be provided with second electric contact 11 in the bottom of the inner cavity of column cavity detection channel 8 and be connected with fixed, be provided with spring 12 in the bottom of the inner cavity of column cavity detection channel 8 and be connected with fixed.

[0034] Wherein:

[0035] Solution flows from the flow port 101.

[0036] Hand wheel 5 is used for manual operation of operator; valve rod 6 is used for adjusting the relative height of gate plate 7.

[0037] Main threaded part 601 is used for connecting valve rod 6 with hand wheel 5.

[0038] The gate 7 is used to block the flow port 101; the first vent 701 and the second vent 9 are mainly used to cooperate with the movement of the first electrical contact 10 to complete the detection work.

[0039] When the first electrical contact 10 can move from top to bottom in the column cavity detection channel 8 and make contact with the second electrical contact 11, it indicates that the valve stem 6 is in a normal state and has not been deformed.

[0040] Working principle:

[0041] It should be noted that the inspection of valve stem 6 and the inspection of the connection between valve stem 6 and gate 7 in the sealing valve are both carried out when the valve is not in operation.

[0042] When checking whether the valve stem 6 is deformed, an air pump is connected to the valve stem 6. This air pump then pumps and evacuates air into the cylindrical detection channel 8 on the valve stem 6. (See attached diagram.) Figure 4 and appendix Figure 5 In the pumping process, the valve stem 6 in the column cavity detection channel 8 will gradually approach the second electrical contact 11 at the bottom from the top of the column cavity detection channel 8. If the valve stem 6 is not deformed and is a straight rod, the first electrical contact 10 will contact the spring 12. Otherwise, it is a case of deformation.

[0043] Furthermore, regarding whether there is any loosening or cracking at the connection between the valve stem 6 and the gate 7, specifically, if a crack appears between the two, that is, if... Figure 5 If there is a problem in area P, the first electrical contact 10, which is pushed by gas, will not be able to move to overlap with the second electrical contact 11 due to gas leakage in the column cavity detection channel 8 caused by the crack at P. At this time, the external indicator that is electrically connected to the first electrical contact 10 and the second electrical contact 11 will not light up, which indicates that there is a problem between the valve stem 6 and the gate 7.

[0044] Furthermore, by adding a valve stem 6 detection mechanism to the sealing valve, the overall operational safety of the valve can be effectively ensured. Before use, the deformation of the valve stem 6 can be detected, and potential safety hazards can be identified in time. For example, when the valve stem 6 is slightly deformed due to overload pressure or vibration, the first electrical contact 10 of the detection mechanism will be obstructed in the column cavity detection channel 8 during detection. The obstruction can indirectly remind the relevant personnel that the column cavity detection channel 8 opened in the valve stem 6 is deformed at this time, that is, the valve stem 6 has been deformed. The above detection allows the operator to take effective countermeasures before the deformation of the valve stem 6 is further aggravated, leading to the failure of the gate 7 seal, a large amount of fluid leakage, or even a serious safety accident that causes the pipeline system to explode, thereby greatly ensuring the safe operation of the entire industrial production process.

[0045] Meanwhile, through the continuous monitoring of whether the valve stem 6 is deformed before each work, the valve stem 6 can be prevented from continuously working in a bad state; when the deformation of the valve stem 6 is detected, timely adjustment can prevent additional wear and damage to the sealing surface of the gate plate 7 and other components caused by the deformation of the valve stem 6; for example, if the valve stem 6 is still forced to operate after deformation, it will intensify the friction between the gate plate 7 and the valve body 1, causing damage to the sealing surface of the gate plate 7 and shortening the service life of the sealing valve as a whole; the presence of the detection assembly can ensure that the sealing valve always operates in good working conditions, thereby effectively prolonging the overall service life.

[0046] Furthermore, during the deformation detection of the valve stem 6, the cooperation between the column cavity detection channel 8 and the first electric contact 10 can detect whether the connection between the valve stem 6 and the gate plate 7 is loose or broken, ensuring safe and stable operation of the system and early warning of serious failures. Once the connection between the valve stem 6 and the gate plate 7 is loose or broken, the gate plate 7 will not be able to control the fluid on-off normally, causing uncontrolled flow of fluid in the flow-through port 101 of the valve body 1, which will bring great safety risks in some high-pressure, flammable and explosive or toxic and harmful fluid conveying scenarios; the column cavity detection channel 8 can detect the connection state between the valve stem 6 and the gate plate 7 on the basis of detecting whether the valve stem 6 is deformed, and can detect the early signs of loosening or breaking, so that the operator can take timely measures to avoid serious safety accidents such as fire and explosion caused by pipe explosion and leakage, and ensure the safety of the entire industrial production environment and personnel;

[0047] At the same time, maintenance costs can be reduced and chain damage can be avoided. When the connection between the valve stem 6 and the gate plate 7 has a problem and is not detected in time, continued operation will cause the gate plate 7 to abnormally swing in the flow-through port 101, and then hit the valve body 1, causing damage to the valve body 1, and causing damage to other equipment such as pumps and filters upstream and downstream; but this design can detect the connection, so that maintenance personnel can repair the problem before it worsens, prevent a small problem from becoming a big problem, and avoid a series of unnecessary repair and replacement costs.

[0048] The above working process please refer to Figures 1 to 5 .

[0049] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0050] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A high sealing gate valve with easy replacement, comprising a valve body (1), characterized in that: The valve body (1) is provided with a flow port (101), the valve body (1) is provided with a valve plate (2), the valve plate (2) is threadedly connected with a fastening screw (3), and the valve body (1) and the valve plate (2) are fixedly connected through the fastening screw (3).

2. A high containment gate valve with easy replacement according to claim 1, characterized in that: The valve plate (2) is fixedly connected with a connecting piece (4), the connecting piece (4) is rotatably connected with a hand wheel (5), and the hand wheel (5) is provided with a main threaded part (601) in the middle.

3. A high containment gate valve with easy replacement according to claim 2, characterized in that: The valve rod (6) is fixedly connected with a gate plate (7) at the bottom, and the gate plate (7) is provided with a first air vent (701).

4. A high containment gate valve with easy replacement according to claim 2, characterized in that: The valve rod (6) is provided with a column cavity detection groove (8), and the bottom of the valve rod (6) is provided with a second air vent (9).

5. A high containment gate valve with easy replacement according to claim 4, characterized in that: The column cavity detection groove (8) is in communication with the second air vent (9).

6. A high containment gate valve with easy replacement according to claim 4, characterized in that: The column cavity detection groove (8) is slidably connected with a first electric contact (10), and the bottom of the column cavity detection groove (8) is fixedly connected with a second electric contact (11). The bottom of the column cavity detection groove (8) is fixedly connected with a spring (12).

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