Cast steel swing check valve

Abstract

The utility model belongs to the technical field of swing check valves, and discloses a cast steel swing check valve which comprises a shell, a cover plate is detachably mounted on the outer wall of the top end of the shell, a mounting mechanism is arranged on the inner wall of the cover plate, an adjusting mechanism is arranged on the inner wall of the cover plate and comprises a moving rod, and the moving rod is movably connected with the mounting mechanism. A rubber ball is fixedly connected to the outer wall of the bottom end of the moving rod, multiple sets of grooves are formed in the outer wall of the moving rod, a fixing block is fixedly connected to the outer wall of the top end of the cover plate, and a wedge block is elastically connected to the inner wall of the fixing block through a spring A. The movable rod is pulled upwards to drive the rubber ball to move upwards, the openable angle of the valve clack can be increased, the movable rod and the rubber ball are moved downwards by shifting the protruding block, the openable angle of the valve clack can be adjusted to be small, and therefore the valve clack can be opened conveniently without rotating a screw and a nut repeatedly. The opening angle of the valve clack can be conveniently and quickly adjusted, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of swing check valves, in particular to a cast steel swing check valve. Background Art

[0002] Cast iron swing check valve is a check valve made of cast iron as the main material. Its working principle is to rely on the power of the fluid itself to open the valve disc. When the fluid flows in the reverse direction, the valve disc automatically closes under the action of its own weight and backflow, thereby preventing the fluid from flowing back. It has the characteristics of simple structure, easy installation and low cost, and is widely used in fluid transportation systems in many fields.

[0003] After searching, it is found that the publication number CN220396597U discloses a swing check valve, including a valve body, a capping mechanism for ensuring the sealing of the top of the device is installed on the upper end of the valve body, and also includes a check mechanism for enabling the device to prevent liquid backflow; through the above technical scheme, when it is necessary to adjust the opening and closing angle of the check valve disc, the main valve is closed first, and the upper half of the screw is outside the capping mechanism. When adjustment is required, the nut on the outer periphery of the screw is loosened first, so that the screw can rotate after being twisted by an external force, so that the check valve can adjust the opening and closing angle of the valve disc without disassembling the capping mechanism.

[0004] Although the above device can adjust the opening and closing angle of the valve disc, in actual use, it is necessary to first unscrew the nut on the outside of the screw, and then rotate the screw to move it up and down before the opening and closing angle of the valve disc can be adjusted. This process is relatively cumbersome. After the adjustment is completed, it is still necessary to fix the position of the screw by rotating the nut multiple times, which is time-consuming and labor-intensive, and reduces work efficiency. Therefore, a cast steel swing check valve is proposed to address the above problems. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a cast steel swing check valve, which solves the problem that it is troublesome to adjust the opening and closing angle of the valve disc in the prior art.

[0006] To achieve the above object, the utility model provides the following technical solution: a cast steel swing check valve, comprising a housing, a cover plate is detachably mounted on the top outer wall of the housing, a mounting mechanism is arranged on the inner wall of the cover plate, and an adjustment mechanism is arranged on the inner wall of the cover plate;

[0007] The adjusting mechanism comprises a moving rod, a rubber ball is fixedly connected to the outer wall of the bottom end of the moving rod, a plurality of grooves are provided on the outer wall of the moving rod, a fixed block is fixedly connected to the outer wall of the top end of the cover plate, a wedge is elastically connected to the inner wall of the fixed block via a spring A, a protrusion is fixedly connected to the outer wall of the wedge, a rotating shaft is fixedly connected to the inner wall of the rotating shaft, a rotating plate is rotatably connected to the inner wall of the rotating plate, and a valve flap is fixedly connected to the outer wall of the rotating plate.

[0008] Preferably, the moving rod is slidably connected to the inner wall of the cover plate, and the rubber ball is in contact with the outer wall of the rotating plate.

[0009] Preferably, one end of the spring A is fixedly connected to the outer wall of the wedge block, and the other end of the spring A is fixedly connected to the inner wall of the fixed block, and the outer wall of the wedge block is slidably connected to the inner wall of the fixed block.

[0010] Preferably, the wedge block is engaged with the groove, and the protrusion passes through and is slidably connected with the top inner wall of the fixing block.

[0011] Preferably, the mounting mechanism includes a mounting block, the inner wall of the mounting block is elastically connected to a clamping block via a spring B, the inner wall of the mounting block is slidably connected to a trapezoidal block, the inner wall of the mounting block is slidably connected to a connecting rod, the top outer wall of the trapezoidal block is fixedly connected to a short rod, and the top inner wall of the shell is provided with a clamping groove.

[0012] Preferably, the mounting block is fixedly connected to the outer wall of the bottom end of the cover plate, one end of the spring B is fixedly connected to the outer wall of the clamping block, the other end of the spring B is fixedly connected to the inner wall of the mounting block, the outer wall of the clamping block is slidably connected to the inner wall of the mounting block, and the clamping block is clamped in the clamping slot.

[0013] Preferably, one end of the connecting rod is fixedly connected to the outer wall of the block, the other end of the connecting rod is slidably connected to the outer wall of the trapezoidal block, and the short rod passes through and is slidably connected to the inner wall of the cover plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model increases the opening angle of the valve flap by pulling the movable rod upward to drive the rubber ball to move upward, and reduces the opening angle of the valve flap by pushing the convex block to disengage the wedge block from the groove and moving the movable rod and the rubber ball downward. Thus, the opening angle of the valve flap can be adjusted quickly and conveniently without rotating the screw rod and nut multiple times, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2This is a schematic diagram of the structure of the cover plate and the shell after being decomposed;

[0018] Figure 3 This is a schematic diagram of the shell section and the adjustment mechanism structure of the utility model;

[0019] Figure 4 For this utility model Figure 3 The enlarged structural diagram of part A in the middle;

[0020] Figure 5 It is a schematic diagram of the structure of the utility model after the cover plate section, the installation block section and the shell are exploded.

[0021] In the figure: 1. shell; 2. cover plate; 3. adjustment mechanism; 301. moving rod; 302. rubber ball; 303. groove; 304. fixing block; 305. spring A; 306. wedge block; 307. protrusion; 308. rotating shaft; 309. valve disc; 310. rotating plate; 4. mounting mechanism; 401. mounting block; 402. short rod; 403. spring B; 404. clamping block; 405. connecting rod; 406. trapezoidal block; 5. clamping slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, the utility model provides a cast steel swing check valve, including a shell 1, a cover plate 2 is detachably mounted on the top outer wall of the shell 1, a mounting mechanism 4 is provided on the inner wall of the cover plate 2, an adjusting mechanism 3 is provided on the inner wall of the cover plate 2, the adjusting mechanism 3 includes a moving rod 301, a rubber ball 302 is fixedly connected to the bottom outer wall of the moving rod 301, a plurality of grooves 303 are provided on the outer wall of the moving rod 301, a fixing block 304 is fixedly connected to the top outer wall of the cover plate 2, a wedge block 306 is elastically connected to the inner wall of the fixing block 304 through a spring A305, a protrusion 307 is fixedly connected to the outer wall of the wedge block 306, a rotating shaft 308 is fixedly connected to the inner wall of the rotating shaft 308, a rotating plate 310 is rotatably connected to the inner wall of the rotating plate 310, and a valve flap 309 is fixedly connected to the outer wall of the rotating plate 310.

[0024] The above scheme is adopted: the housing 1 is a cast steel swing check valve body, which is a prior art well known to professionals in the field and will not be described in detail here; Figure 1As shown, the right side of the shell 1 is the water outlet, which is connected to the external water inlet pipe through a flange, and the left side of the shell 1 is the water inlet, which is connected to the external water outlet pipe through a flange. The rotating shaft 308, the rotating plate 310 and the valve flap 309 are all arranged on the left side of the shell 1, and the valve flap 309 can only be flipped to the right. When water enters the left side of the shell 1, the valve flap 309 opens to drain the water, and the valve flap 309 and the rotating plate 310 flip at the same time with the rotating shaft 308 as the center, and the water flows out from the right water outlet, and when the water flows out from the right to the left, the valve flap 309 is closed by the impact force of the water, thereby achieving a non-return effect; through the adjustment mechanism 3, the opening angle of the valve flap 309 can be adjusted more conveniently and quickly to control the water flow rate and meet the water flow requirements under different working conditions.

[0025] like Figures 2 to 4 As shown, the moving rod 301 is slidably connected to the inner wall of the cover plate 2, the rubber ball 302 contacts the outer wall of the rotating plate 310, one end of the spring A305 is fixedly connected to the outer wall of the wedge block 306, and the other end of the spring A305 is fixedly connected to the inner wall of the fixed block 304, the outer wall of the wedge block 306 is slidably connected to the inner wall of the fixed block 304, the wedge block 306 is clamped with the groove 303, and the protrusion 307 passes through and is slidably connected to the top inner wall of the fixed block 304.

[0026] The above scheme is adopted: through the elastic force of the spring A305 itself, when not affected by external forces, the wedge block 306 keeps the state of popping outward, and the straight surface of the wedge block 306 contacts the inner wall of the top end of a group of grooves 303, supporting the moving rod 301 so that the moving rod 301 will not move downward; when it is necessary to adjust the opening angle of the valve flap 309, the moving rod 301 can be pulled upward, and the inner wall of the groove 303 squeezes the arc surface of the wedge block 306, so that it moves inward along the inner wall of the fixed block 304, so that the moving rod 301 can be pulled upward, and the rubber ball 302 moves upward synchronously therewith. At this time, when the valve flap 309 is opened by the influence of water flow, the rotating plate 310 can be flipped to a greater angle until it contacts the rubber ball 302, so that the opening angle of the valve flap 309 can be adjusted. When the protrusion 307 is pushed to make the wedge 306 move inward along the inner wall of the fixed block 304 and the wedge 306 is out of contact with the groove 303, the moving rod 301 and the rubber ball 302 can be moved downward. When the valve flap 309 is opened, the rotating plate 310 is rotated at a smaller angle and then contacts the rubber ball 302, thereby reducing the opening angle of the valve flap 309. When the moving rod 301 is adjusted to a suitable position, the wedge 306 pops out due to the elastic force of the spring A305 itself and engages with a group of grooves 303, so that the position of the moving rod 301 can be fixed. Since there are multiple groups of grooves 303, the moving rod 301 can be adjusted to multiple positions for fixing, which has high adaptability and does not need to be adjusted by rotating the screw nut multiple times, which is more convenient and quick.

[0027] like Figure 5 As shown, the mounting mechanism 4 includes a mounting block 401, the inner wall of the mounting block 401 is elastically connected to a clamping block 404 through a spring B403, the inner wall of the mounting block 401 is slidably connected to a trapezoidal block 406, the inner wall of the mounting block 401 is slidably connected to a connecting rod 405, the top outer wall of the trapezoidal block 406 is fixedly connected to a short rod 402, a clamping groove 5 is provided on the top inner wall of the shell 1, the mounting block 401 is fixedly connected to the bottom outer wall of the cover plate 2, one end of the spring B403 is fixedly connected to the outer wall of the clamping block 404, the other end of the spring B403 is fixedly connected to the inner wall of the mounting block 401, the outer wall of the clamping block 404 is slidably connected to the inner wall of the mounting block 401, the clamping block 404 is clamped to the clamping groove 5, one end of the connecting rod 405 is fixedly connected to the outer wall of the clamping block 404, the other end of the connecting rod 405 is slidably connected to the outer wall of the trapezoidal block 406, and the short rod 402 penetrates and is slidably connected to the inner wall of the cover plate 2.

[0028] The above scheme is adopted: the cover plate 2 can be fixed on the shell 1 through the installation block 401, and two groups of springs B403, clamping blocks 404 and connecting rods 405 are provided, and are symmetrically distributed on the inner walls on both sides of the installation block 401; when not affected by external forces, the clamping block 404 remains in a state of popping outwards due to the elastic force of the spring B403 itself, and drives the connecting rod 405 to remain in contact with the long side wall of the bottom end of the trapezoidal block 406; when the short rod 402 is pressed downward, the trapezoidal block 406 moves downward synchronously, so that the connecting rod 405 moves along the long side wall of the bottom end of the trapezoidal block 406 to the short side wall of the top end, that is, drives the two groups of clamping blocks 404 to move simultaneously During the movement, the spring B403 is forced to contract, and the installation block 401 can be inserted into the shell 1, and the cover 2 is closed. At this time, the block 404 is squeezed by the inner wall of the shell 1 and maintained in the inner wall of the installation block 401. Then the cover 2 can be rotated to make the installation block 401 rotate synchronously. When the two groups of blocks 404 are rotated to correspond to the position of the slot 5, the block 404 pops out under the elastic force of the spring B403 and engages with the slot 5, and the cover 2 is fixed. When the cover 2 needs to be removed, the limit of the cover 2 can be released by pressing the short rod 402. The installation and disassembly process is faster, easier to operate, and improves work efficiency.

[0029] The working principle and use process of this utility model:

[0030] Shell 1 is the main body of the check valve, with the water outlet on the right side and the water inlet on the left side. When water enters from the left side, the valve flap 309 opens to drain the water, and the valve flap 309 and the rotating plate 310 flip around the rotating shaft 308, and the water flows out from the right water outlet. When the water flows out from the right side to the left side, the valve flap 309 is flipped and closed by the impact force of the water, thereby achieving a check effect.

[0031] The regulating mechanism 3 can adjust the opening angle of the valve flap 309 to control the water flow; when not affected by external force, the wedge block 306 is kept in an outward pop-up state and is engaged with a group of grooves 303 through the elastic force of the spring A305 itself, supporting the moving rod 301 from moving downward; when it is necessary to increase the opening angle of the valve flap 309 to increase the water flow, the moving rod 301 is pulled upward, and the inner wall of the groove 303 squeezes the arc surface of the wedge block 306 to move it inward, and the moving rod 301 and the rubber ball 302 move upward synchronously, so that when the valve flap 309 is opened by the water flow, the rotating plate 310 can flip to a larger angle until it contacts the rubber ball 302, thereby increasing the angle; if the angle needs to be reduced, turn the The protrusion 307 causes the wedge block 306 to move inward and disengage from the groove 303, and then moves the moving rod 301 and the rubber ball 302 downward. When the valve flap 309 is opened by the impact of the water flow, the rotating plate 310 rotates a small angle to contact the rubber ball 302, thereby achieving control of the water flow rate; when the position adjustment of the moving rod 301 is completed, the wedge block 306 corresponds to the position of a group of grooves 303, and the spring A305 drives the wedge block 306 to pop out and engage with the corresponding groove 303, so that the position of the moving rod 301 can be fixed. Since there are multiple groups of grooves 303, the moving rod 301 can be fixed at multiple positions, with high adaptability, and no need to adjust by turning the screw nut multiple times, which is more convenient.

[0032] The mounting mechanism 4 is used for mounting and fixing the cover 2. The spring B403 in the mounting block 401 enables the card block 404 to remain in an outward pop-up state without being affected by external forces, driving the connecting rod 405 to contact the long side wall of the bottom end of the trapezoidal block 406. When the short rod 402 is pressed downward, the trapezoidal block 406 moves downward, causing the connecting rod 405 to move to the short side wall of the top end, driving the card block 404 to move inward, and the spring B403 contracts. At this time, the mounting block 401 can be inserted into the shell 1 to close the cover 2, and then the cover 2 is rotated. When the position of the card block 404 corresponds to the position of the card slot 5, the card block 404 pops out under the elastic force of the spring B403 and engages with the card slot 5 to complete the fixation. When disassembling, pressing the short rod 402 can make the two groups of card blocks 404 move to the middle at the same time to release the limit. The installation and disassembly process is faster and more convenient, thereby improving work efficiency.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cast steel swing check valve, comprising a housing (1), characterized in that: A cover plate (2) is detachably mounted on the top outer wall of the shell (1), a mounting mechanism (4) is provided on the inner wall of the cover plate (2), and an adjustment mechanism (3) is provided on the inner wall of the cover plate (2); The regulating mechanism (3) comprises a moving rod (301), the outer wall of the bottom end of the moving rod (301) is fixedly connected to a rubber ball (302), the outer wall of the moving rod (301) is provided with a plurality of grooves (303), the outer wall of the top end of the cover plate (2) is fixedly connected to a fixing block (304), the inner wall of the fixing block (304) is elastically connected to a wedge block (306) via a spring A (305), the outer wall of the wedge block (306) is fixedly connected to a protrusion (307), the inner wall of the housing (1) is fixedly connected to a rotating shaft (308), the inner wall of the rotating shaft (308) is rotatably connected to a rotating plate (310), and the outer wall of the rotating plate (310) is fixedly connected to a valve flap (309).

2. The cast steel swing check valve according to claim 1, characterized in that: The moving rod (301) is slidably connected to the inner wall of the cover plate (2), and the rubber ball (302) is in contact with the outer wall of the rotating plate (310).

3. The cast steel swing check valve according to claim 1, characterized in that: One end of the spring A (305) is fixedly connected to the outer wall of the wedge block (306), and the other end of the spring A (305) is fixedly connected to the inner wall of the fixed block (304). The outer wall of the wedge block (306) is slidably connected to the inner wall of the fixed block (304).

4. The cast steel swing check valve according to claim 1, characterized in that: The wedge block (306) is engaged with the groove (303), and the protrusion (307) penetrates and is slidably connected with the top inner wall of the fixed block (304).

5. The cast steel swing check valve according to claim 1, characterized in that: The mounting mechanism (4) comprises a mounting block (401), the inner wall of the mounting block (401) being elastically connected to a clamping block (404) via a spring B (403), the inner wall of the mounting block (401) being slidably connected to a trapezoidal block (406), the inner wall of the mounting block (401) being slidably connected to a connecting rod (405), the top outer wall of the trapezoidal block (406) being fixedly connected to a short rod (402), and the top inner wall of the housing (1) being provided with a clamping groove (5).

6. The cast steel swing check valve according to claim 5, characterized in that: The mounting block (401) is fixedly connected to the outer wall of the bottom end of the cover plate (2); one end of the spring B (403) is fixedly connected to the outer wall of the clamping block (404); the other end of the spring B (403) is fixedly connected to the inner wall of the mounting block (401); the outer wall of the clamping block (404) is slidably connected to the inner wall of the mounting block (401); and the clamping block (404) is clamped to the clamping slot (5).

7. The cast steel swing check valve according to claim 5, characterized in that: One end of the connecting rod (405) is fixedly connected to the outer wall of the block (404), the other end of the connecting rod (405) is slidably connected to the outer wall of the trapezoidal block (406), and the short rod (402) passes through and is slidably connected to the inner wall of the cover plate (2).

Images