Open type double-valve-clack stop valve

Abstract

The utility model discloses an open type double-valve-clack stop valve, which relates to the technical field of stop valves and comprises a valve body and a valve cover, a valve rod penetrates through the valve cover in a sliding manner, a fixing rod is fixedly mounted on the valve cover, a fixing plate is fixedly mounted on the fixing rod, one end of the valve rod penetrates through the fixing plate, and a threaded sleeve is fixedly arranged on the valve rod. The top of the valve rod is fixedly connected with a top plate, the top of the top plate is connected with a rain baffle through a bolt, the rain baffle is in a circular truncated cone shape, the diameter of the bottom of the rain baffle is larger than that of the valve cover, and the rain baffle can effectively shield rainwater and direct sunlight. Rainwater can flow away along the slope due to the shape of the circular truncated cone, accumulation of the rainwater on the valve cover is reduced, corrosion of the rainwater to the valve rod, the valve cover and other components is avoided, meanwhile, the stainless steel material can avoid the problems of aging, hardening, embrittlement or elasticity losing and the like, stable performance can be kept for a long time, and the service life of the protection component is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of stop valve, concretely to an open type double-disc stop valve. BACKGROUND

[0002] With the continuous development of the industry of the cut-off valve, the types of the stop valve produced are also increasing. The stop valve is also called a gate valve, which belongs to a forced sealing type valve. The sealing is achieved by applying torque to the valve rod, and the valve rod applies pressure to the valve disc in the axial direction to make the valve disc sealing surface tightly contact the valve seat sealing surface, thereby preventing leakage of the medium along the gap between the sealing surfaces.

[0003] The Chinese utility model patent with patent application number 202321277594.1 provides a double-disc stop valve. The rubber protective shell arranged at the bottom end of the hand wheel can shield the exposed valve rod, thereby avoiding damage to the valve rod caused by rain erosion. By removing the fastening bolts, the connecting block and the rubber protective shell can be removed to achieve the purpose of replacement.

[0004] However, during use of the above-mentioned device, it is found that the rubber is easily affected by sunlight, temperature, humidity and other factors and ages when exposed to the natural environment for a long time, which causes the rubber to become hard, brittle or lose elasticity, reduces the protection performance, and shortens the service life. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides an open type double-disc stop valve, which solves the problem of aging of the rubber caused by exposure to the natural environment for a long time, which is easily affected by sunlight, temperature, humidity and other factors, which causes the rubber to become hard, brittle or lose elasticity, reduces the protection performance, and shortens the service life.

[0006] To achieve the above-mentioned purpose, the utility model is implemented by the following technical scheme: an open type double-disc stop valve, comprising a valve body and a valve cover, a valve rod is slidably penetrated in the valve cover, a fixed rod is fixedly installed on the valve cover, a fixed plate is fixedly installed on the fixed rod, one end of the valve rod penetrates the fixed plate, a threaded sleeve is fixedly arranged on the valve rod, the threaded sleeve is screw-connected with the fixed plate, a top plate is fixedly connected to the top of the valve rod, a rain shield is connected to the top of the top plate through bolts, the rain shield is in the shape of a circular truncated cone, and the diameter of the bottom of the rain shield is greater than the diameter of the valve cover.

[0007] Preferably, a hexagonal handle is fixedly arranged on the top of the rain shield.

[0008] Preferably, the rain shield and the handle are made of stainless steel.

[0009] Preferably, one side of the fixed plate is provided with a limiting assembly, the limiting assembly comprises a limiting rod, a connecting plate is rotatably installed on the limiting rod, both ends of the connecting plate are connected with a mounting plate through springs, the spring is sleeved on a guide rod, the guide rod is fixedly installed on the connecting plate and penetrates through the mounting plate, the mounting plate is fixed at the bottom of the fixed plate, a connecting ring is fixedly installed on the limiting rod, a stop rod is fixedly arranged on the connecting ring, and one end of the limiting rod is fixedly connected with a pull handle.

[0010] Preferably, a stop seat is fixedly installed on the mounting plate, and a notch is formed in the stop seat and matched with the stop rod.

[0011] Preferably, a limiting groove is vertically formed in the outer surface of the threaded sleeve, and the limiting rod is matched with the limiting groove.

[0012] The utility model provides a kind of open double valve disc stop valve.It has the following beneficial effects:

[0013] (1), the rain shield of the utility model can effectively shield rainwater and direct sunlight.The circular table shape appearance can make rainwater flow along the slope, reduce the accumulation of rainwater on the valve cover, avoid the erosion of rainwater to valve stem and valve cover and other components, while stainless steel material can avoid problems such as aging, hardening, embrittlement or loss of elasticity, can maintain stable performance for a long time, greatly prolong the service life of protective components.

[0014] (2), the utility model discloses a limiting assembly, which can prevent the valve stem from rotating accidentally, keep the valve in the set open or closed state, avoid the change of valve opening caused by accidental rotation of valve stem, ensure the stability of fluid flow, pressure and other parameters in the system, and maintain the normal operation of the whole system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure display drawing of the utility model;

[0016] Figure 2 It is the overall structure bottom view display drawing of the utility model; Figure 1

[0017] It is the structure display drawing of valve stem in the utility model; Figure 3 Figure 2 It is the structure display drawing of limiting assembly in the utility model.

[0018] Figure 4 Figure 3 It is the structure display drawing of limiting assembly in the utility model.

[0019] ​​In the figure, 1, valve body; 2, valve cover; 21, fixed rod; 22, fixed plate; 23, valve rod; 24, top plate; 25, threaded sleeve; 26, limiting groove; 3, rain shield; 4, rotating handle; 5, limiting assembly; 51, limiting rod; 52, connecting plate; 53, guide rod; 54, spring; 55, mounting plate; 56, stop seat; 561, notch; 57, connecting ring; 58, stop rod; 59, pull handle. DETAILED DESCRIPTION

[0020] 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. Embodiment 1

[0021] Please refer to Figures 1-4 An open type double-disc check valve, comprising a valve body 1 and a valve cover 2, a valve rod 23 is slidably penetrated in the valve cover 2, a fixed rod 21 is fixedly installed on the valve cover 2, a fixed plate 22 is fixedly installed on the fixed rod 21, one end of the valve rod 23 penetrates through the fixed plate 22, a threaded sleeve 25 is fixedly arranged on the valve rod 23, the threaded sleeve 25 is screw-connected with the fixed plate 22, a top plate 24 is fixedly connected with the top of the valve rod 23, a rain shield 3 is connected with the top of the top plate 24 through bolts, the rain shield 3 is in the shape of a circular truncated cone, and the diameter of the bottom of the rain shield 3 is greater than the diameter of the valve cover 2;

[0022] The top of the rain shield 3 is fixedly provided with a hexagonal rotating handle 4;

[0023] The rain shield 3 and the rotating handle 4 are made of stainless steel.

[0024] Specifically, the valve body 1 is the main part of the check valve, used for installing and accommodating other components, and is also a passage for fluid. The valve cover 2 cooperates with the valve body 1 to seal the internal structure of the valve, prevent fluid leakage, and provide support and installation position for the valve rod 23 and other components. One end of the valve rod 23 is connected with a valve disc, and the other end extends out of the valve cover 2. By rotating the valve rod 23, the valve disc can be moved up and down, thereby controlling the opening and closing of the valve, and realizing the control of fluid on-off and flow.

[0025] The fixed rod 21 is fixed on the valve cover 2, and the fixed plate 22 is installed on the fixed rod 21. It is mainly used for supporting and positioning the valve rod 23, and providing a connection basis for the threaded sleeve 25, so that the valve rod 23 can be moved up and down by the screw connection of the threaded sleeve 25 and the fixed plate 22 when the valve rod 23 is rotated.

[0026] The top plate 24 is fixed at the top of the valve stem 23 for connecting the rain shield 3, which is in the shape of a circular truncated cone with a larger diameter at the bottom than the valve cover 2, which can effectively block rain and sunlight, prevent rain from directly pouring on the valve cover 2 and the valve stem 23, avoid the valve stem 23 from rusting due to rain erosion, and also reduce the aging effect of direct sunlight on the valve components. At the same time, it is made of stainless steel, has good corrosion resistance and oxidation resistance, can be used in outdoor environment for a long time without being easily damaged, compared with other materials that are easily aged, greatly prolongs the service life and reduces the maintenance cost. Its circular truncated cone design is beneficial to the rapid sliding of rainwater and reduces the damage of accumulated water to the valve.

[0027] The rotating handle 4 is installed at the top of the rain shield 3, which is in the shape of a hexagon to facilitate the rotation of the valve stem 23 by the operator, thereby controlling the opening and closing of the valve.

[0028] Further, in order to avoid accidental rotation of the valve stem 23, please refer to Figures 1-4 The limiting assembly 5 is provided on one side of the fixed plate 22, which includes a limiting rod 51, a connecting plate 52 is rotatably installed on the limiting rod 51, both ends of the connecting plate 52 are connected with the mounting plate 55 through the spring 54, the spring 54 is sleeved on the guide rod 53, the guide rod 53 is fixedly installed on the connecting plate 52 and penetrates through the mounting plate 55, the mounting plate 55 is fixedly installed on the bottom of the fixed plate 22, the limiting rod 51 is fixedly installed with a connecting ring 57, the connecting ring 57 is fixedly provided with a stop rod 58, and one end of the limiting rod 51 is fixedly connected with a pull handle 59.

[0029] The mounting plate 55 is fixedly installed with a stop seat 56, and a slot 561 is formed in the stop seat 56 and matched with the stop rod 58.

[0030] A limiting groove 26 is vertically formed on the outer surface of the threaded sleeve 25, and the limiting rod 51 is matched with the limiting groove 26.

[0031] Specifically, when it is necessary to limit the rotation of the valve stem 23, the limiting rod 51 is inserted into the limiting groove 26 on the outer surface of the threaded sleeve 25, and since the limiting rod 51 is matched with the limiting groove 26, the rotation of the threaded sleeve 25 is limited, thereby preventing the rotation of the valve stem 23 fixedly connected with the threaded sleeve 25.

[0032] Meanwhile, when the valve rod 23 needs to be controlled to rotate, the pull handle 59 is pulled to make the limit rod 51 disengage from the limiting groove 26, and in the process, the guide rod 53 slides in the mounting plate 55, and the spring 54 is contracted. When the movement of the limit rod 51 drives the stop rod 58 to move to the vicinity of the slot 561, the operator rotates the pull handle 59, and through the rotating connection of the limit rod 51 and the connecting plate 52, the stop rod 58 rotates around the axis of the limit rod 51, so that the stop rod 58 corresponds to the slot 561. Then, the pull handle 59 is released, so that the spring 54 loses the external force limitation and restores to the original state, drives the limit rod 51 to move, and promotes the stop rod 58 to enter the slot 561, thereby realizing the stability of the position of the limit rod 51, and facilitating the rotation of the handle 4 after the limit rod 51 disengages from the limiting groove 26.

[0033] By limiting the valve rod 23, the change of the valve opening caused by the accidental rotation of the valve rod 23 is avoided, thereby causing the fluctuation of the fluid flow, pressure and other parameters in the system, and the stability and reliability of the entire fluid conveying system are ensured.

[0034] Working principle: in the initial state, the valve rod 23 is in a certain position, at this time, the limit rod 51 is inserted into the limiting groove 26 of the threaded sleeve 25, limiting the rotation of the valve rod 23, ensuring that the valve remains closed or open, preventing the valve rod 23 from rotating due to accidental touch and other reasons.

[0035] When the valve needs to be adjusted, the pull handle 59 is pulled first to disengage the limit rod 51 from the limiting groove 26, and then the pull handle 59 is rotated to make the stop rod 58 rotate around the axis of the limit rod 51 to correspond to the slot 561. Then, the pull handle 59 is released, and the stop rod 58 enters the slot 561 under the action of the spring 54, realizing the stability of the position of the limit rod 51, at this time, the limit rod 51 no longer limits the rotation of the threaded sleeve 25 and the valve rod 23.

[0036] The operator rotates the handle 4, and the handle 4 drives the valve rod 23 to rotate to realize the adjustment of the valve. After the adjustment is completed, the pull handle 59 is pulled to make the stop rod 58 disengage from the slot 561, the spring 54 is contracted to drive the limit rod 51 to move, the pull handle 59 is reversely rotated, the pull handle 59 is released, and the spring 54 pushes the limit rod 51 to insert into the limiting groove 26 to limit the rotation of the valve rod 23.

[0037] In the daily state of the valve, the rain shield 3 shields the threaded sleeve 25 and the valve rod 23, avoiding the direct rain on the threaded sleeve 25 and the valve rod 23, avoiding the rust of the valve rod 23 caused by rain erosion, and also reducing the aging influence of direct sunlight on the valve rod 23.

[0038] The basic principle and main features of the present application and the advantages of the present application are shown and described above. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0039] In addition, it should be understood that, although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. An open double-disc stop valve comprising a valve body (1) and a bonnet (2) in which a valve stem (23) is slidably passed through, characterized in that: The valve cover (2) is fixedly installed with a fixed rod (21), the fixed rod (21) is fixedly installed with a fixed plate (22), one end of the valve rod (23) penetrates the fixed plate (22), the valve rod (23) is fixedly provided with a threaded sleeve (25), the threaded sleeve (25) is screw-connected with the fixed plate (22), the top of the valve rod (23) is fixedly connected with a top plate (24), the top of the top plate (24) is connected with a rain shield (3) through bolts, the rain shield (3) is in the shape of a circular truncated cone, and the diameter of the bottom of the rain shield (3) is greater than the diameter of the valve cover (2).

2. An open double disc check valve according to claim 1, characterized in that: The top of the rain shield (3) is fixedly provided with a hexagonal handle (4).

3. An open double disc check valve according to claim 2, wherein: The rain shield (3) and the handle (4) are both made of stainless steel.

4. An open double disc check valve according to claim 3, wherein: One side of the fixed plate (22) is provided with a limiting assembly (5), the limiting assembly (5) comprises a limiting rod (51), the limiting rod (51) is rotatably installed with a connecting plate (52), both ends of the connecting plate (52) are connected with a mounting plate (55) through springs (54), the spring (54) is sleeved on a guide rod (53), the guide rod (53) is fixedly installed on the connecting plate (52) and penetrates the mounting plate (55), the mounting plate (55) is fixedly installed on the bottom of the fixed plate (22), the limiting rod (51) is fixedly installed with a connecting ring (57), the connecting ring (57) is fixedly provided with a stop rod (58), and one end of the limiting rod (51) is fixedly connected with a pull handle (59).

5. An open double disc check valve according to claim 4, wherein: The mounting plate (55) is fixedly installed with a stop seat (56), the stop seat (56) is provided with a notch (561), and the notch (561) is matched with the stop rod (58).

6. An open double disc check valve according to claim 5, wherein: A limiting groove (26) is vertically formed on the outer surface of the threaded sleeve (25), and the limiting rod (51) is correspondingly matched with the limiting groove (26).

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