Lifting type check valve

Abstract

The utility model relates to the technical field of fluid control equipment, and discloses a lifting type check valve which comprises a valve cover and a valve body, the valve cover and the valve body are connected through a bolt, a guide sleeve is arranged in the valve cover, a valve rod is arranged in the guide sleeve, an adjusting mechanism and a fixing assembly are arranged on the valve cover, and the valve cover and the valve body are connected through a bolt. An outlet cavity and an inlet cavity are formed in the valve body, a valve seat is arranged in the valve body, a sealing table is arranged on the valve seat, a cleaning plate is arranged on the sealing table, a valve clack is arranged at the bottom of the valve rod, an elastic sealing ring is arranged on the valve clack, and a first spring is arranged between the pressing plate and the elastic sealing ring. The opening pressure of the valve clack is accurately adjusted through the adjusting mechanism, a user can flexibly adjust the pressure without opening the valve cover, the applicability and the flexibility are improved, the cleaning plate makes contact with the elastic sealing ring, the surface of the sealing ring is automatically cleaned, the service life of the valve is prolonged, and the maintenance frequency is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control equipment technical field especially relates to a lift check valve. BACKGROUND

[0002] The lift check valve is a kind of valve commonly used in pipeline system, mainly used to prevent fluid reverse flow in pipeline;

[0003] Through the search announcement No. CN105840889B Chinese patent discloses a kind of lift check valve, including valve body, valve cover, valve flap, valve cover is fixedly connected with valve body, valve seat section is L-shaped, its horizontal section and the bottom of the valve flap abuts when valve is closed, the upper end of valve flap is fixedly installed elastic sealing ring through pressing plate A, the outer edge of elastic sealing ring cooperates with valve seat and forms sealing pair, at least 2 support frames are set in the outer circle of pressing plate A, spring is successively installed on the support frame, the outer circumferential surface of spring is attached to the outer edge of elastic sealing ring, pressing plate B is set above spring, and pressing plate B is fixed by bolt with valve flap, the size of pressure that spring exerts on the outer edge of elastic sealing ring can be adjusted by adjusting the tightness of bolt.The beneficial effects of the present application are: by adjusting the tightening degree of bolt, the radial compression amount of spring is changed, and then the size of pressure that spring exerts on the outer edge of elastic sealing ring is changed, so that the pressure when valve is opened is adjusted, so that the application range of valve is wider, and it is convenient for customer to use.

[0004] The valve flap opening pressure of lift check valve is set in advance. User cannot adjust according to the specific pipeline demand. This leads to the valve can not work normally in some special pipeline environment, when adjusting opening pressure needs to remove multiple bolts, open valve cover, and re-set, and the adjustment process is relatively cumbersome, affects the efficiency of system, secondly, the sealing ring and valve seat used by lift check valve are easily affected by impurity accumulation and wear during long-term operation, especially when used in sewage or other solid particle-containing medium, sealing ring is easily contaminated, leading to leakage problem, therefore, a kind of lift check valve is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a kind of lift check valve, to improve the valve flap opening pressure usually needs to disassemble multiple bolts and re-set, and the adjustment process is cumbersome and affects system efficiency and sealing ring is easily affected by impurity accumulation and wear during long-term operation, especially when used in sewage or solid particle-containing medium, easily leading to sealing failure, causing leakage problem.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a lifting check valve, including valve cover and valve body, the valve cover and valve body are connected through bolt, be provided with the guide sleeve in the valve cover, be provided with the valve stem in the guide sleeve, be provided with the adjusting mechanism and fixed assembly on the valve cover,

[0007] The adjusting mechanism includes a screw rod, the screw rod is arranged in the valve stem, the screw rod is threadedly connected with a nut, the nut is connected with a pressing plate through a connecting rod, the nut is provided with a limiting assembly, the valve cover is provided with a knob, and the knob is provided with a transmission assembly.

[0008] As a further description of the above technical scheme:

[0009] The limiting assembly includes a plurality of slide rods, and the plurality of slide rods are arranged in the valve stem.

[0010] As a further description of the above technical scheme:

[0011] The transmission assembly includes a rotating shaft one, the rotating shaft one is arranged on the knob, the rotating shaft one is provided with a gear one, the screw rod is provided with a gear two, and the gear one is meshed with the gear two.

[0012] As a further description of the above technical scheme:

[0013] The valve body is provided with an outlet cavity and an inlet cavity, the valve body is provided with a valve seat, the valve seat is provided with a sealing table, and the sealing table is provided with a cleaning plate.

[0014] As a further description of the above technical scheme:

[0015] The bottom of the valve stem is provided with a valve flap, the valve flap is provided with an elastic sealing ring, and a spring one is arranged between the pressing plate and the elastic sealing ring.

[0016] As a further description of the above technical scheme:

[0017] The fixed assembly includes a clamping key, the outer side of the valve stem is provided with a clamping groove, the clamping key is arranged in the clamping groove, and the clamping key is provided with a driving assembly.

[0018] As a further description of the above technical scheme:

[0019] The driving assembly includes a sliding block, the valve cover is provided with a sliding groove, the sliding block is arranged in the sliding groove, the sliding block and the clamping key are connected through a connecting piece, and the connecting piece is provided with a reset assembly.

[0020] As a further description of the above technical scheme:

[0021] The reset assembly includes a spring two, a receiving groove is formed in the valve cover, and the spring two is arranged between the inner wall of the receiving groove and the connecting piece.

[0022] The utility model has the advantages of the following beneficial effects:

[0023] 1. In the utility model, the adjusting mechanism (such as a screw rod, a nut, a connecting rod, etc.) is used to realize accurate adjustment of the opening pressure of the valve disc, the position of the nut and the pressing plate is adjusted by rotating the knob, thereby controlling the pressure of the spring one on the elastic sealing ring. This makes the valve flexible to adjust the opening pressure according to different working environments and pipeline pressure requirements, without the need to open the valve cover to adjust the pressure of the spring one. The adjustability makes the check valve of the utility model more suitable for various application scenarios, enhancing its applicability and flexibility.

[0024] 2. In the utility model, the cleaning plate contacts the elastic sealing ring when the valve is opened and closed, thereby cleaning the surface of the sealing ring and preventing impurities from accumulating to affect the sealing performance. The self-cleaning function can ensure that the elastic sealing ring always maintains good sealing effect in long-term use, reduces the leakage problem caused by deposits or dirt, thereby greatly improving the service life of the valve and reducing the maintenance frequency. This design enhances the stability and reliability of the valve under harsh working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A perspective view of a lifting check valve is provided for the utility model;

[0026] Figure 2 A cross-sectional structure schematic view of a lifting check valve is provided for the utility model;

[0027] Figure 3 An adjusting mechanism structure schematic view of a lifting check valve is provided for the utility model;

[0028] Figure 4 is Figure 2 An enlarged view of position A in the utility model.

[0029] LEGEND:

[0030] 1, bonnet; 2, guide sleeve; 3, valve stem; 4, valve body; 5, outlet cavity; 6, valve seat; 7, inlet cavity; 8, adjusting mechanism; 801, knob; 802, rotating shaft I; 803, gear I; 804, gear II; 805, screw rod; 806, nut; 807, connecting block; 808, sliding rod; 809, connecting rod; 9, pressing plate; 10, spring I; 11, cleaning plate; 12, sealing platform; 13, elastic sealing ring; 14, valve flap; 15, fixed assembly; 1501, sliding groove; 1502, sliding block; 1503, connecting piece; 1504, clamping groove; 1505, storage groove; 1506, spring II; 1507, clamping key. DETAILED DESCRIPTION

[0031] 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 protection scope of the utility model.

[0032] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the utility model provides an embodiment: a lift check valve, including bonnet 1 and valve body 4, bonnet 1 and valve body 4 are connected through bolt, be provided with guide sleeve 2 in bonnet 1, be provided with valve stem 3 in guide sleeve 2, be provided with outlet cavity 5 and inlet cavity 7 in valve body 4, be provided with valve seat 6 in valve body 4, be provided with sealing platform 12 on valve seat 6, be provided with cleaning plate 11 on sealing platform 12, the bottom of valve stem 3 is provided with valve flap 14, be provided with elastic sealing ring 13 on valve flap 14, be provided with spring I 10 between pressing plate 9 and elastic sealing ring 13.

[0033] Specifically, bonnet 1 and valve body 4 are tightly connected through bolt, provide the sealing property and stability of valve, and bonnet 1 and valve body 4 can withstand higher pressure in work, simultaneously through bolt can take down bonnet 1 and be convenient for maintenance and disassembly, guide sleeve 2 provides place for the installation of valve stem 3, and guide sleeve 2 can limit the movement track of valve stem 3, the outlet cavity 5, valve seat 6 and inlet cavity 7 provided in valve body 4 serve as the basis for liquid circulation, valve stem 3 provides place for the installation of valve flap 14, valve flap 14 is the component for realizing the function and check function of valve, elastic sealing ring 13 is the key component for adjusting opening pressure, and also the sealing component of valve under closing, the compression amount of pressing plate 9 through adjusting spring I 10 can accurately adjust the pressure exerted on elastic sealing ring 13, thereby adjusting the fluid pressure when valve opens;

[0034] The sealing platform 12 provides a place for the installation of the cleaning plate 11, which is made of flexible material with a large friction coefficient and cleans the attachments on the surface of the elastic sealing ring 13 during contact with the elastic sealing ring 13.

[0035] With reference to Figure 1 , Figure 2 、 Figure 3 and Figure 4 , the valve cover 1 is provided with an adjusting mechanism 8, which includes a screw rod 805 arranged in the valve rod 3, a nut 806 threadedly connected to the screw rod 805, a pressing plate 9 connected to the nut 806 through a connecting rod 809, a limiting assembly arranged on the nut 806, a knob 801 arranged on the valve cover 1, and a transmission assembly arranged on the knob 801;

[0036] The limiting assembly includes a plurality of slide rods 808 arranged in the valve rod 3, and a connecting block 807 slidably connected to each of the slide rods 808, the connecting block 807 being arranged on the nut 806;

[0037] The transmission assembly includes a rotating shaft one 802 arranged on the knob 801, a gear one 803 arranged on the rotating shaft one 802, and a gear two 804 arranged on the screw rod 805, the gear one 803 being meshingly connected to the gear two 804.

[0038] Specifically, the knob 801 provides an action point for manual external pressure adjustment, the rotating shaft one 802 enables the rotation of the knob 801 to become the rotation of the gear one 803, and then transmits the movement to the screw rod 805 through the meshing relationship between the gear one 803 and the gear two 804. When the screw rod 805 rotates, the slide rods 808 limit the movement track of the connecting block 807, and then the nut 806 on the connecting block 807 does not rotate with the screw rod 805 but moves linearly on the screw rod 805. Through the connection of the connecting rod 809, the pressing plate 9 is driven to move, so that the pressing plate 9 can extrude the spring one 10.

[0039] With reference to Figure 1 , Figure 2 、 Figure 3 and Figure 4 , the valve cover 1 is provided with a fixing assembly 15, which includes a clamping key 1507 arranged in a clamping groove 1504 formed on the outer side of the valve rod 3, and a driving assembly arranged on the clamping key 1507;

[0040] The driving assembly includes a sliding block 1502 arranged in a sliding groove 1501 formed on the valve cover 1, and a connecting piece 1503 connecting the sliding block 1502 and the clamping key 1507, the connecting piece 1503 being provided with a reset assembly.

[0041] The reset assembly comprises a spring 1506, a receiving groove 1505 is formed in the valve cover 1, and the spring 1506 is arranged between the inner wall of the receiving groove 1505 and the connecting piece 1503.

[0042] Specifically, the key 1507 is clamped into the clamping groove 1504 to limit the valve rod 3, so that the valve rod 3 does not rotate with the screw rod 805 during pressure adjustment, thereby achieving the purpose of adjusting the pressure. The opening of the sliding groove 1501 provides trajectory limitation for the movement of the sliding block 1502. Then the sliding block 1502 can drive the key 1507 to move through the connecting piece 1503. The receiving groove 1505 provides a place for the spring 1506 to be set up. The elastic potential energy of the spring 1506 can quickly reset the connecting piece 1503, so as to avoid the key 1507 from being mistakenly clamped into the clamping groove 1504 during daily use, thereby causing the valve to fail.

[0043] Working principle: liquid enters the valve body 4 from the inlet cavity 7, reaches the valve seat 6, and is lifted by the liquid pressure to lift the elastic sealing ring 13 and the valve flap 14, so that the valve rod 3 slides in the guide sleeve 2, and the liquid then flows out of the outlet cavity 5;

[0044] When it is necessary to adjust the pressure at which the valve flap 14 is opened, the sliding block 1502 in the sliding groove 1501 is slid, at this time the spring 1506 in the receiving groove 1505 is stretched, and under the driving of the connecting piece 1503, the key 1507 is slid into the clamping groove 1504 to fix the valve rod 3, then the knob 801 is rotated, the knob 801 drives the first rotating shaft 802 to rotate, the gear 803 rotates at the same frequency as the first rotating shaft 802, and the gear 803 and the gear 804 are engaged to make the screw rod 805 rotate. The nut 806 linearly moves on the screw rod 805 under the limitation of the sliding rod 808 and the connecting block 807, and the connecting rod 809 is connected to make the pressure plate 9 move with the nut 806. The pressure of the spring 10 on the elastic sealing ring 13 is adjusted, and after the adjustment is completed, the spring 1506 drives the connecting piece 1503 to reset;

[0045] During the process of circulating opening of the valve flap 14 in the liquid entering the valve body 4, the spring sealing ring contacts the cleaning plate 11 on the sealing table 12, and the cleaning plate 11 cleans the outer surface of the spring sealing ring to ensure the sealing performance of the spring sealing ring when it is closed.

[0046] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A lift check valve comprising a bonnet (1) and a valve body (4), characterized in that: The valve cover (1) and valve body (4) are connected by bolts. A guide sleeve (2) is provided inside the valve cover (1), and a valve stem (3) is provided inside the guide sleeve (2). An adjustment mechanism (8) and a fixing component (15) are provided on the valve cover (1). The adjusting mechanism (8) includes a screw (805), which is disposed inside the valve stem (3). A nut (806) is threaded onto the screw (805). A pressure plate (9) is connected to the nut (806) via a connecting rod (809). A limit component is provided on the nut (806). A knob (801) is provided on the valve cover (1). A transmission component is provided on the knob (801).

2. A lift check valve according to claim 1, wherein: The limiting assembly includes multiple slide rods (808), which are disposed inside the valve stem (3). Each slide rod (808) is slidably connected to a connecting block (807), which is disposed on a nut (806).

3. A lift-type check valve according to claim 1, characterized in that: The transmission assembly includes a rotating shaft (802), which is mounted on a knob (801). A gear (803) is mounted on the rotating shaft (802), and a gear (804) is mounted on the screw (805). The gear (803) and gear (804) are meshed together.

4. A lift-type check valve according to claim 1, characterized in that: The valve body (4) has an outlet (5) and an inlet (7) inside. The valve body (4) has a valve seat (6) inside. The valve seat (6) has a sealing platform (12) on it. The sealing platform (12) has a cleaning plate (11) on it.

5. A lift-type check valve according to claim 1, characterized in that: A valve disc (14) is provided at the bottom of the valve stem (3), and an elastic sealing ring (13) is provided on the valve disc (14). A spring (10) is provided between the pressure plate (9) and the elastic sealing ring (13).

6. A lift-type check valve according to claim 1, characterized in that: The fixing component (15) includes a key (1507), and a slot (1504) is provided on the outer side of the valve stem (3). The key (1507) is disposed in the slot (1504), and a driving component is provided on the key (1507).

7. A lift-type check valve according to claim 6, characterized in that: The driving component includes a slider (1502), and a groove (1501) is provided on the valve cover (1). The slider (1502) is disposed in the groove (1501). The slider (1502) is connected to the key (1507) through a connector (1503). A reset component is provided on the connector (1503).

8. A lift-type check valve according to claim 7, characterized in that: The reset assembly includes a second spring (1506), and a storage groove (1505) is provided in the valve cover (1). The second spring (1506) is disposed between the inner wall of the storage groove (1505) and the connector (1503).

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