Backflow prevention ball valve structure

Abstract

The utility model provides an anti-backflow ball valve structure, and relates to the technical field of ball valves. A valve body B is connected to the exterior of the valve body A, an opening and closing valve element is installed in the valve body A, and the valve body A communicates with the valve body B through the opening and closing valve element; a valve rod is installed in the top of the valve body A, the bottom end of the valve rod is inserted into the opening and closing valve element, the valve rod is sleeved with a sealing ring A, and the sealing ring A makes contact with the valve body A; the top of the valve body A is in threaded connection with a nut, the valve rod penetrates through the nut, and the top of the valve rod is connected with a hand wheel. The blocking plate is fixed through the clamping spring, the sliding rod is in sliding fit with the sliding hole, the blocking plate guiding effect is achieved, the elastic resetting effect on the blocking plate is achieved through the spring, when liquid flows forwards, the blocking plate is jacked open by the liquid, the spring is in a contracted shape, when the liquid stops flowing, the blocking plate is affected by the thrust of the spring and makes close contact with the valve body B, and therefore the blocking plate is prevented from falling off. And the interior of the valve body B is blocked, so that the liquid backflow condition is effectively avoided, and the safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field especially relates to a prevent backflow ball valve structure. BACKGROUND

[0002] Ball valve is the opening and closing piece is driven by valve stem, and rotates around the ball valve axis movement valve; ball valve appeared in the 1950s, along with the rapid development of science and technology, production technology and product structure are constantly improved, in the short 40 years, has rapidly developed into a major valve.

[0003] The existing ball valve is single in function, and the design mainly concentrates on realizing the regulation and control operation of fluid, however, the important performance of preventing backflow is not considered; in actual application, when fluid backflow occurs, it not only interferes with the normal fluid conveying process, but also is likely to have a serious impact on the safety of the whole system. UTILITY MODEL CONTENTS

[0004] The present disclosure relates to a kind of prevent backflow ball valve structure, solve the existing ball valve is single in function, and the design mainly concentrates on realizing the regulation and control operation of fluid, however, the important performance of preventing backflow is not considered;When fluid backflow occurs, it is likely to have a serious impact on the safety of the whole system.

[0005] The first aspect of the present disclosure provides a kind of prevent backflow ball valve structure, specifically including: valve body A;The valve body A outside is connected with valve body B, and valve body A is installed with opening and closing valve core, and valve body A is communicated with valve body B by opening and closing valve core;The valve body A top is installed with valve stem, and valve stem bottom end is inserted into opening and closing valve core, and valve stem outside is equipped with sealing ring A, and sealing ring A is in contact with valve body A;The valve body A top is screwed with nut, and valve stem is inserted into nut, and valve stem top is connected with hand wheel;The valve body A inside is installed with sealing ring B, and sealing ring B is in contact with opening and closing valve core;The valve body B inside is installed with sealing ring C, and sealing ring C is in contact with opening and closing valve core;The valve body B outside is equipped with screw sleeve, and screw sleeve is connected with valve body A;The valve body B inside is installed with through plate and baffle, and through plate is connected with baffle.

[0006] Further, the valve body B is inserted into valve body A, and the valve body B outside is provided with sealing groove, and the valve body A is inserted into sealing groove, and the sealing groove inside is installed with sealing ring D, and sealing ring D is in contact with valve body A.

[0007] Further, the valve body A inside is provided with guide groove in ring shape, and the valve body B outside is provided with convex strip in ring shape, and the convex strip is slidably connected in guide groove, and the convex strip and guide groove are slidably matched, effectively avoid that rotation occurs between valve body B and valve body A.

[0008] Further, the screw sleeve is rotationally connected with the valve body B, the screw sleeve is threadedly connected with the valve body A, when the screw sleeve is tightened, the sealing ring B is in close contact with the valve body A and the opening and closing valve core, the sealing ring C is in close contact with the valve body B and the opening and closing valve core, and the sealing ring D is in close contact with the valve body A and the valve body B.

[0009] Further, the valve body B is internally provided with a positioning groove, a snap spring is connected in the positioning groove, and one side of the snap spring is in contact with the through plate.

[0010] Further, the through plate is internally provided with a sliding hole, the block plate is in contact with the valve body B on one side, the block plate is provided with a sliding rod on the other side, the sliding rod is slidably penetrated into the sliding hole, the sliding rod and the sliding hole are in sliding fit, and the block plate is guided.

[0011] Further, the sliding rod is externally provided with a spring, one end of the spring is in contact with the through plate, the other end of the spring is in contact with the block plate, the spring is used for elastically resetting the block plate, when liquid flows forward, the liquid pushes away the block plate, and the spring is in a contraction state, when the liquid stops flowing, the block plate is in close contact with the valve body B under the influence of the spring pushing force, the inside of the valve body B is blocked, and the liquid backflow condition is avoided.

[0012] The utility model provides a kind of anti-backflow ball valve structure, with following beneficial effects:

[0013] The utility model in use, through convex strip and guide groove sliding fit, effectively avoid the rotation between valve body B and valve body A, when screw sleeve is tightened, sealing ring B is in close contact with valve body A and opening and closing valve core, sealing ring C is in close contact with valve body B and opening and closing valve core, and sealing ring D is in close contact with valve body A and valve body B, effectively guarantee the self-sealing property of ball valve, and it is more convenient to disassemble, just reverse rotation screw sleeve, it can split valve body B and valve body A.

[0014] In addition, the through plate is fixed by the snap spring, the sliding rod and the sliding hole are in sliding fit, the block plate is guided, and the spring is used for elastically resetting the block plate, when liquid flows forward, the liquid pushes away the block plate, and the spring is in a contraction state, when the liquid stops flowing, the block plate is in close contact with the valve body B under the influence of the spring pushing force, the inside of the valve body B is blocked, effectively avoid the occurrence of liquid backflow condition, and guarantee safety.

[0015] Other advantages, objects and features of the utility model will be partly reflected through the following description, and some will be understood by the person skilled in the art through the research and practice of the utility model. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0017] The drawings in the following description are merely some embodiments of the present application, and are not a limitation of the present application.

[0018] In the drawings:

[0019] Figure 1 The overall shaft side structure schematic diagram of the present application is shown;

[0020] Figure 2 The overall cut structure schematic diagram of the present application is shown;

[0021] Figure 3 The valve body A, opening and closing valve core, valve stem and nut split structure schematic diagram of the present application is shown;

[0022] Figure 4 The valve body B, sealing ring C, sealing ring D and screw sleeve split structure schematic diagram of the present application is shown;

[0023] Figure 5 The through plate, blocking plate and clasp spring split structure schematic diagram of the present application is shown.

[0024] List of reference signs

[0025] 1, valve body A; 101, guide groove; 2, valve body B; 201, convex strip; 202, sealing groove; 203, positioning groove; 3, opening and closing valve core; 4, valve stem; 401, sealing ring A; 5, nut; 6, sealing ring B; 7, sealing ring C; 8, sealing ring D; 9, screw sleeve; 10, through plate; 1001, sliding hole; 11, blocking plate; 1101, sliding rod; 12, spring; 13, clasp spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Embodiment one: please refer to Figures 1 to 5 :

[0028] The utility model provides a kind of anti-return ball valve structure, comprising: valve body A1;Valve body A1 outside is connected with valve body B2, and valve body A1 inside is equipped with opening and closing valve core 3, and valve body A1 is communicated with valve body B2 by opening and closing valve core 3;Valve stem 4 is installed in the top of valve body A1, and the bottom end of valve stem 4 is inserted in opening and closing valve core 3, and sealing ring A401 is sleeved on the outside of valve stem 4, and sealing ring A401 is in contact with valve body A1;Nut 5 is threadedly connected on the top of valve body A1, and valve stem 4 penetrates in nut 5, and the top of valve stem 4 is connected with hand wheel;Sealing ring B6 is installed in the inside of valve body A1, and sealing ring B6 is in contact with opening and closing valve core 3;Sealing ring C7 is installed in the inside of valve body B2, and sealing ring C7 is in contact with opening and closing valve core 3;Sleeve nut 9 is sleeved on the outside of valve body B2, and sleeve nut 9 is connected with valve body A1;Through plate 10 and blocking plate 11 are installed in the inside of valve body B2, and through plate 10 is connected with blocking plate 11.

[0029] In the embodiment of the present disclosure, the valve body B2 is inserted into the valve body A1, the valve body B2 is provided with a sealing groove 202 outside, the valve body A1 is inserted into the sealing groove 202, the sealing groove 202 is provided with a sealing ring D8 inside, the sealing ring D8 is in contact with the valve body A1, the valve body A1 is provided with a guide groove 101 inside in a surrounding manner, the valve body B2 is provided with a convex strip 201 outside in a surrounding manner, the convex strip 201 is slidably connected in the guide groove 101, the sleeve nut 9 is rotatably connected with the valve body B2, and the sleeve nut 9 is threadedly connected with the valve body A1.

[0030] By the sliding cooperation of the convex strip 201 and the guide groove 101, the rotation between the valve body B2 and the valve body A1 is effectively avoided, when the sleeve nut 9 is tightened, the sealing ring B6 is in close contact with the valve body A1 and the opening and closing valve core 3, the sealing ring C7 is in close contact with the valve body B2 and the opening and closing valve core 3, and the sealing ring D8 is in close contact with the valve body A1 and the valve body B2, which effectively guarantees the sealing property of the ball valve, and the disassembly is more convenient, only need to rotate the sleeve nut 9 reversely, the valve body B2 and the valve body A1 can be separated.

[0031] In the embodiment two, on the basis of the embodiment one, the valve body B2 is provided with a positioning groove 203 inside, the positioning groove 203 is connected with a snap spring 13 inside, one side of the snap spring 13 is in contact with the through plate 10, the through plate 10 is provided with a sliding hole 1001 inside, one side of the blocking plate 11 is in contact with the valve body B2, the other side of the blocking plate 11 is provided with a sliding rod 1101, the sliding rod 1101 is slidably penetrated in the sliding hole 1001, the sliding rod 1101 is sleeved with a spring 12 outside, one end of the spring 12 is in contact with the through plate 10, and the other end of the spring 12 is in contact with the blocking plate 11.

[0032] Adopt the above technical scheme, through the clamp spring 13 to the through plate 10 is fixed, the slide rod 1101 and the slide hole 1001 slide fit, play to the guide effect to the block plate 11, and through the spring 12 play to the elastic reset effect of the block plate 11, when liquid flows positively, liquid will open the block plate 11, spring 12 is in the contraction state, when liquid stops flowing, the block plate 11 is affected by the thrust of spring 12 and the valve body B2 is in close contact, the inside of valve body B2 is blocked, effectively avoid the occurrence of liquid backflow condition, guarantee safety.

[0033] The working principle of the embodiment is: the valve body A1 and the valve body B2 are inserted together, the convex strip 201 and the guide groove 101 are slidably connected, effectively avoiding the rotation between the valve body B2 and the valve body A1; the sealing ring B6 is in close contact with the valve body A1 and the opening and closing valve core 3, the sealing ring C7 is in close contact with the valve body B2 and the opening and closing valve core 3, the sealing ring D8 is in close contact with the valve body A1 and the valve body B2, guaranteeing the sealing property of the ball valve itself; the through plate 10 is fixed by the clamp spring 13, the slide rod 1101 and the slide hole 1001 are slidably connected, playing a guide effect to the block plate 11, and through the spring 12 play to the elastic reset effect of the block plate 11, when liquid flows positively, liquid will open the block plate 11, spring 12 is in the contraction state, when liquid stops flowing, the block plate 11 is affected by the thrust of spring 12 and the valve body B2 is in close contact, the inside of valve body B2 is blocked, effectively avoid the occurrence of liquid backflow condition.

[0034] In this paper, the following points need attention:

[0035] 1. The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design.

[0036] 2. In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined to obtain new embodiments.

[0037] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A backflow prevention ball valve structure, comprising: Valve body A (1); characterized in that valve body A (1) is externally connected to valve body B (2), valve body A (1) is internally installed with valve core (3), and valve body A (1) is connected to valve body B (2) through valve core (3); valve stem (4) is installed inside the top of valve body A (1), the bottom end of valve stem (4) is inserted into valve core (3), and a sealing ring A (401) is fitted on the outside of valve stem (4), the sealing ring A (401) is in contact with valve body A (1); a nut (5) is threadedly connected to the top of valve body A (1), and valve stem (4) The valve stem (4) is connected to the handwheel at the top of the nut (5); the valve body A (1) is equipped with a sealing ring B (6), which is in contact with the valve core (3); the valve body B (2) is equipped with a sealing ring C (7), which is in contact with the valve core (3); the valve body B (2) is fitted with a screw sleeve (9), which is connected to the valve body A (1); the valve body B (2) is equipped with a through plate (10) and a blocking plate (11), which are connected to each other.

2. The anti-backflow ball valve structure according to claim 1, characterized in that, The valve body B (2) is inserted into the valve body A (1). A sealing groove (202) is provided on the outside of the valve body B (2). The valve body A (1) is inserted into the sealing groove (202). A sealing ring D (8) is installed inside the sealing groove (202). The sealing ring D (8) is in contact with the valve body A (1).

3. The anti-backflow ball valve structure according to claim 1, characterized in that, The valve body A (1) has a guide groove (101) arranged in a ring shape inside, and the valve body B (2) has a protrusion (201) arranged in a ring shape outside, and the protrusion (201) is slidably connected in the guide groove (101).

4. The anti-backflow ball valve structure according to claim 1, characterized in that, The screw sleeve (9) is rotatably connected to the valve body B (2), and the screw sleeve (9) is threadedly connected to the valve body A (1).

5. The anti-backflow ball valve structure according to claim 1, characterized in that, The valve body B (2) is provided with a positioning groove (203), and a snap ring (13) is connected inside the positioning groove (203). One side of the snap ring (13) is in contact with the through plate (10).

6. The anti-backflow ball valve structure according to claim 1, characterized in that, The through plate (10) has a sliding hole (1001) inside. One side of the blocking plate (11) is in contact with the valve body B (2), and the other side of the blocking plate (11) is provided with a sliding rod (1101). The sliding rod (1101) slides through the sliding hole (1001).

7. The anti-backflow ball valve structure according to claim 6, characterized in that, The slide bar (1101) is fitted with a spring (12), one end of which is in contact with the through plate (10), and the other end of which is in contact with the blocking plate (11).

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