Pneumatic stop valve

Abstract

The utility model discloses a pneumatic stop valve which comprises a valve body, a water passing channel is formed in the valve body, a valve cover is arranged at the top of the valve body, a valve rod is arranged in the middle of the valve body in a sliding mode, a valve clack is arranged at the lower end of the valve rod, an annular clamping groove is formed in the bottom of the valve clack, and a sealing plate is clamped in the annular clamping groove. The support is arranged at the upper end of the valve cover to install the pneumatic actuator, the output end of the pneumatic actuator is in transmission connection with the top of the valve rod, the pneumatic actuator drives the valve rod to slide up and down, then opening and closing of the stop valve are achieved, operation is easy and convenient, time and labor are saved, and control is convenient. The sealing plate is arranged at the bottom of the valve clack and matched with the boss in the middle of the water passing channel to open and close the water passing channel of the stop valve, on one hand, the sealing performance of the valve clack and the boss is enhanced, on the other hand, the valve clack does not make direct contact with the boss, abrasion of the valve clack is reduced, the service life of the valve clack is prolonged, and cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, especially pneumatic stop valve. BACKGROUND

[0002] Stop valve is a kind of valve with large use amount, and has many structural forms, which can meet the requirements of different working conditions;Stop valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive medium;The opening stroke of the valve stem of the stop valve is relatively short, and the opening height is generally only 1 / 4 of the diameter of the valve seat passage;The friction between the sealing surfaces of the stop valve is small, and it has very reliable shut-off function. Generally, the stop valve has only one sealing surface, so the manufacturing process is good, and it is easy to maintain, so the stop valve is widely used in industrial systems.

[0003] But the ordinary stop valve is inconvenient to operate, and the hand wheel needs to be manually rotated to adjust the valve stem when opening and closing, and it is used frequently, which can cause wear of the valve disc and the boss when they frequently contact, causing leakage at the connection, thereby affecting the sealing performance of the stop valve and reducing the service life of the valve disc.

[0004] Therefore, it is necessary to provide a pneumatic stop valve to solve the above technical problems. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a pneumatic stop valve to solve the problems in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a pneumatic stop valve, comprising a valve body, a water passage is formed in the valve body, a valve cover is arranged at the top of the valve body, a valve stem is slidably arranged in the middle of the valve body, a valve disc is arranged at the lower end of the valve stem, an annular clamping groove is formed in the bottom of the valve disc, a sealing plate is clamped in the annular clamping groove, the sealing plate is tightly combined with the boss on which the water passage is formed in the middle of the valve body, the upper end of the valve stem extends above the valve cover, a support is arranged at the top of the valve cover, the top of the valve stem is located in the support, a clamping block is arranged in the support, a pin shaft is arranged at the lower end of the clamping block, the lower end of the pin shaft is inserted into the top of the valve cover, a filler is inserted into the middle of the clamping block, the filler is sleeved on the outer circumferential surface of the valve stem, a pneumatic actuator is arranged at the top of the support, the output end of the pneumatic actuator is in transmission connection with the top of the valve stem, a pneumatic three-way joint is arranged on the pneumatic actuator, a signal feedback device is arranged at the connection between the pneumatic actuator and the valve stem, the output end of the signal feedback device is arranged at the connection between the valve stem and the pneumatic actuator, an inlet bypass valve is arranged at the bottom of the valve body, and an outlet bypass valve is arranged in the valve body.

[0007] As a preferred technical scheme of the utility model, the valve stem outer circumferential surface lower end is provided with a valve clack nut, the valve stem lower end is connected in the valve clack through valve clack nut screw thread.

[0008] As a preferred technical scheme of the utility model, the valve stem outer circumferential surface lower end is provided with a valve clack nut, the valve stem lower end is connected in the valve clack through valve clack nut screw thread.

[0009] As a preferred technical scheme of the utility model, the valve clack top is provided with a positioning sheet.

[0010] As a preferred technical scheme of the utility model, the valve clack bottom middle position is provided with a convex column, the convex column outer circumferential surface is provided with external thread, the convex column is provided with a sealing pressing plate, the convex column is provided with a first nut, the convex column is provided with a first split pin.

[0011] As a preferred technical scheme of the utility model, the filler top is provided with a filler gland, the filler gland is provided with a pressing block, the pressing block, filler gland and clamping block are provided with a loose bolt, the loose bolt bottom is provided with a second split pin, the loose bolt top is provided with a nut.

[0012] As a preferred technical scheme of the utility model, the valve body and valve cover are provided with a middle gasket.

[0013] As a preferred technical scheme of the utility model, the valve cover and valve body connecting place four corners are provided with a stud, the stud top penetrates valve body and valve cover and extends to the upper, the stud top is provided with a second nut.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] The utility model discloses a pneumatic stop valve, the utility model discloses a support is established to install pneumatic actuator on the valve cover top, make the output of pneumatic actuator and the top transmission connection of valve stem, drive valve stem up and down sliding through pneumatic actuator, and then realize the opening and closing of stop valve, simple and convenient operation, save time and effort, control conveniently, install the packing sleeve on the outer circumferential surface of valve stem in the support, seal the connecting place of valve stem and support and valve cover, set up signal feedback ware on the support can real -time monitoring the working condition of pneumatic actuator and valve stem connecting place, in time signal feedback gives pneumatic three joint spare, control pneumatic actuator work through pneumatic three joint spare, set up sealing plate and the boss cooperation of water passage middle part in the valve clack bottom, open and close the water passage of stop valve, on the one hand strengthen the sealing performance of valve clack and boss, prevent the leakage of liquid through the connecting place of boss and valve clack when stop valve is in the closed state, on the other hand make valve clack not with boss direct contact, reduce the wear and tear of valve clack, when the sealing plate uses a long time wear and tear and leaks, only need to replace sealing plate and do not need to replace valve clack, and then prolong the service life of valve clack, save the cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further explained in connection with the drawings and examples.

[0017] Figure 1 It is the overall structure of the utility model section view.

[0018] In the drawing: 1, valve body;2, first open pin;3, first nut;4, sealing pressure plate;5, sealing plate;6, valve clack;7, split ring;8, valve clack nut;9, positioning piece;10, valve stem;11, middle gasket;12, stud;13, valve cover;14, packing;15, second nut;16, second open pin;17, pin shaft;18, loose bolt;19, packing gland;20, inlet bypass valve;21, outlet bypass valve;22, support;23, signal feedback ware;24, pneumatic actuator;25, pneumatic three joint spare. DETAILED DESCRIPTION

[0019] The embodiments of the utility model will be explained below with reference to the drawings. In this process, for the sake of ensuring the explicitness and convenience of the explanation, we can exaggerate the width of the lines or the size of the constituent elements in the drawings.

[0020] In addition, the terms in the following are defined based on the functions in the utility model, and can be different according to the intention or custom of the user or the user. Therefore, these terms are defined based on the whole content of the specification.

[0021] As Figure 1As shown, a kind of pneumatic stop valve, including valve body 1, the water passage is opened in the valve body 1, the valve body 1 top is provided with valve cover 13, the valve body 1 and valve cover 13 between being provided with middle gasket 11, the junction of valve body 1 and valve cover 13 is sealed by middle gasket 11, prevent water from the junction of the two leakage, the valve cover 13 and the junction of valve body 1 are inserted with stud 12 in four corners, the stud 12 top extends to the upper portion through valve body 1 and valve cover 13, the stud 12 top is threadedly connected with second nut 15, valve cover 13 is locked and fixed on the top of valve body 1 by stud 12 and second nut 15 cooperation.

[0022] The valve body 1 middle part is slidably provided with valve stem 10, the outer circumferential surface of the valve stem 10 lower end is provided with valve flap nut 8, the valve stem 10 lower end is provided with valve flap 6, the valve stem 10 lower end is threadedly connected in valve flap 6 by valve flap nut 8, the part of the valve stem 10 deeply into valve flap 6 is provided with recess, the recess is clamped with split ring 7, the split ring 7 is below valve flap nut 8, the valve flap 6 top is provided with positioning piece 9, valve flap nut 8 is positioned, easy to install, the valve flap 6 bottom is provided with annular clamping groove, the annular clamping groove is clamped with sealing plate 5, the valve flap 6 bottom middle position is provided with convex column, the outer circumferential surface of the convex column is provided with external thread, the convex column is provided with sealing pressure plate 4, the convex column is threadedly connected with first nut 3, sealing pressure plate 4 is pressed on the bottom of sealing plate 5 by first nut 3, the convex column is inserted with first split pin 2, the opening and closing of water passage is realized by the cooperation of sealing plate 5 and the convex on the water passage in the middle part of valve body 1, sealing plate 5 and convex are closely combined, increase the sealing property, make the closed water passage effect better, prevent leakage.

[0023] The upper end of the valve stem 10 extends through the valve cover 13 to above it, the top of the valve cover 13 is provided with a bracket 22, the top of the valve stem 10 is located in the bracket 22, a clamping block is arranged in the bracket 22, the lower end of the clamping block is provided with a pin shaft 17, the lower end of the pin shaft 17 is inserted into the top of the valve cover 13, a packing 14 is inserted into the middle of the clamping block, the packing 14 is sleeved on the outer circumferential surface of the valve stem 10, the top of the packing 14 is provided with a packing gland 19, the packing gland 19 is provided with a pressing block, the pressing block, the packing gland 19 and the clamping block are inserted with a loose bolt 18, the bottom of the loose bolt 18 is inserted with a second open pin 16, the top of the loose bolt 18 is threadedly connected with a nut, the packing 14 is tightly fixed by cooperation of the loose bolt 18 and the nut, the top of the bracket 22 is provided with a pneumatic actuator 24, the output end of the pneumatic actuator 24 is drivingly connected with the top of the valve stem 10, the valve stem 10 is driven to slide up and down by the pneumatic actuator 24, thereby realizing opening and closing of the stop valve, the pneumatic actuator 24 is provided with a pneumatic three-way joint 25, the pneumatic actuator 24 is controlled to act by the pneumatic three-way joint 25, the connection between the pneumatic actuator 24 and the valve stem 10 is provided with a signal feedback device 23, the output end of the signal feedback device 23 is arranged at the connection between the valve stem 10 and the pneumatic actuator 24, for detecting the state of the two when working, the bottom of the valve body 1 is provided with an inlet bypass valve 20, the inside of the valve body 1 is provided with an outlet bypass valve 21, the stop valve is protected by the inlet bypass valve 20 and the outlet bypass valve 21.

[0024] Specifically, the pneumatic actuator 24 is installed by arranging the bracket 22 on the upper end of the valve cover 13, so that the output end of the pneumatic actuator 24 is drivingly connected with the top of the valve stem 10, the valve stem 10 is driven to slide up and down by the pneumatic actuator 24, thereby realizing opening and closing of the stop valve, which is simple and convenient to operate, saves time and effort, and is easy to control. The packing 14 is installed in the bracket 22 and sleeved on the outer circumferential surface of the valve stem 10, which seals the connection between the valve stem 10, the bracket 22 and the valve cover 13. The signal feedback device 23 arranged on the bracket 22 can monitor the working state of the connection between the pneumatic actuator 24 and the valve stem 10 in real time, and feedback the signal to the pneumatic three-way joint 25 in time, so as to control the pneumatic actuator 24 to work. The sealing plate 5 arranged at the bottom of the valve disc 6 cooperates with the boss in the middle of the water passage to open and close the water passage of the stop valve. On the one hand, it strengthens the sealing performance of the valve disc 6 and the boss, preventing liquid from leaking through the connection between the boss and the valve disc 6 when the stop valve is in the closed state. On the other hand, the valve disc 6 does not directly contact the boss, reducing the wear of the valve disc 6. When the sealing plate 5 is worn and leaks after being used for a long time, only the sealing plate 5 needs to be replaced, not the valve disc 6, thereby prolonging the service life of the valve disc 6 and saving costs.

[0025] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature or implementation described herein. The specification can include implicit combinations of explicitly mentioned features and / or implicit combinations of implicitly mentioned features. Such combinations are also expressly included within the scope of the specification and an embodiment.

Claims

1. A pneumatic globe valve characterized by: The utility model provides a valve, including the valve body (1), the water passage is opened in the valve body (1), the valve cover (13) is arranged at the top of valve body (1), the valve rod (10) is arranged in the middle part of valve body (1) and slides, the valve rod (10) lower end is provided with valve clapper (6), the bottom of valve clapper (6) is provided with annular clamping groove, the sealing plate (5) is clamped in the annular clamping groove, the sealing plate (5) is tightly combined with the boss of the water passage in the middle part of valve body (1), the valve rod (10) upper end extends to above the valve cover (13) and passes through the valve cover (13), the support (22) is arranged at the top of valve cover (13), the valve rod (10) top is located in the support (22), the support (22) is provided with the clamping block, the pin shaft (17) is arranged at the lower end of clamping block, the pin shaft (17) lower end is inserted in the top of valve cover (13), the filler (14) is inserted in the middle part of clamping block, the filler (14) is sleeved on the outer circumferential surface of valve rod (10), the pneumatic actuator (24) is arranged at the top of support (22), the output of pneumatic actuator (24) is connected with the transmission of valve rod (10) top, the pneumatic actuator (24) is provided with pneumatic triplex (25), the signal feedback ware (23) is arranged at the joint of pneumatic actuator (24) and valve rod (10), the output of signal feedback ware (23) is arranged at the joint of valve rod (10) and pneumatic actuator (24), the inlet bypass valve (20) is arranged at the bottom of valve body (1), the outlet bypass valve (21) is arranged in the inside of valve body (1).

2. A pneumatic globe valve according to claim 1, characterized in that: The outer circumferential surface of the valve rod (10) is provided with a valve nut (8) at the lower end, and the valve rod (10) is threadedly connected in the valve clapper (6) through the valve nut (8).

3. A pneumatic globe valve according to claim 1, wherein: The part of the valve rod (10) that goes deep into the valve clapper (6) is provided with a groove, and the split ring (7) is clamped in the groove.

4. A pneumatic globe valve according to claim 1, wherein: The top of the valve clapper (6) is provided with a positioning piece (9).

5. A pneumatic globe valve according to claim 1, wherein: The bottom of the valve clapper (6) is provided with a convex column at the middle position, an external thread is formed on the outer circumferential surface of the convex column, a sealing pressing plate (4) is sleeved on the convex column, a first nut (3) is threadedly connected on the convex column, and a first split pin (2) is inserted on the convex column.

6. A pneumatic globe valve according to claim 1, wherein: The filler (14) is provided with a filler gland (19) at the top, the filler gland (19) is provided with a pressing block, a loose bolt (18) is inserted in the pressing block, the filler gland (19), and the clamping block, a second split pin (16) is inserted at the bottom of the loose bolt (18), and a nut is threadedly connected at the top of the loose bolt (18).

7. A pneumatic globe valve according to claim 1, wherein: A middle gasket (11) is arranged between the valve body (1) and the valve cover (13).

8. A pneumatic globe valve according to claim 1, wherein: Screw posts (12) are inserted at the four corners of the joint of the valve cover (13) and the valve body (1), the screw posts (12) extend upwards and penetrate through the valve body (1) and the valve cover (13), and second nuts (15) are threadedly connected at the top of the screw posts (12).

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