Throttling stop valve

Abstract

The utility model discloses a throttling stop valve, and belongs to the technical field of stop valves. The valve rod is in transmission connection with the top of the valve body, the rotating wheel is fixedly connected with the top end of the valve rod, the connecting pipes are communicated with the two sides of the valve body, a positioning structure is arranged on the surface of the valve body and comprises a connecting block arranged on the top of the valve body, and the connecting block is fixedly connected with the valve body. The push block is extruded through the transmission structure, the push block slides on the surface of the valve rod and extrudes the extension rod, the extension rod is extruded and drives the pressing rod to swing with the pin shaft in the connecting block as the axis, and when the side, away from the connecting block, of the pressing rod makes contact with the surface of the connecting pipe, the effect that the connecting pipe is extruded, installed and connected is achieved; according to the stop valve, the connection mode of an existing stop valve can be improved, connection through a thread assembly is replaced, the operation step that extrusion needs to be conducted through a plurality of thread assemblies in the installation process is omitted, and the phenomenon that the axis of the stop valve deviates is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of stop valves, in particular to a throttling stop valve. Background Art

[0002] The stop valve is a forced sealing valve. When the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem must be larger, otherwise the valve stem will bend.

[0003] For example, the patent number disclosed by the China Patent Network is: 202220727116.5, and the patent name is: A throttling stop valve, including a valve body, a pipeline, a connecting flange, a sealing sleeve, a locking ring, a connecting bolt, a top plate and an indicator block, which is installed with the connecting flange through the pipeline, the connecting flange is installed with the sealing sleeve, the sealing sleeve is installed with the locking ring, and the locking ring is installed with the connecting bolt. After the connecting flange is connected to the pipeline, the sealing sleeve is used to protect the connection between the connecting flange and the pipeline, and the sealing sleeve is made to fit with the outer wall of the pipeline by tightening the connecting bolt, thereby avoiding the connection between the connecting flange and the pipeline from being corroded by the external environment, thereby extending the service life of the throttling stop valve, and installing a scale bar at the middle end of one side of the top surface of the valve plate, the scale bar is sleeved with the top plate, and the scale bar is used to move with the displacement of the valve plate. The operator grasps the displacement distance of the valve plate by observing the scale bar, so that the operator can intuitively grasp the flow rate of the fluid.

[0004] However, the connection method of the existing stop valve is relatively simple, mainly connected through a threaded component. During the installation process, multiple threaded components need to be squeezed. The different squeezing depths of the symmetrical threaded components will cause the stop valve to have an axial deviation phenomenon, affecting the liquid delivery effect.

[0005] Therefore, it is necessary to redesign the throttling stop valve. Utility Model Content

[0006] In order to solve the problems raised in the above-mentioned background technology, the purpose of the utility model is to provide a throttling stop valve, which has the advantage of improving the convenience of installation, and solves the problem that the connection method of the existing stop valve is relatively single, mainly through a threaded component, and multiple threaded components need to be squeezed during the installation process. The different extrusion depths of the symmetrical threaded components will cause the stop valve to have an axial deviation phenomenon, affecting the liquid delivery effect.

[0007] The utility model provides the following technical solution: a throttling stop valve, comprising a valve body;

[0008] The transmission is connected to the valve stem at the top of the valve body;

[0009] A runner fixedly connected to the top of the valve stem;

[0010] Connecting pipes connected to both sides of the valve body;

[0011] The surface of the valve body is provided with a positioning structure;

[0012] The positioning structure includes a connecting block arranged on the top of the valve body, the connecting block is fixedly connected to the valve body, pressure rods are arranged on the front and back sides of the connecting block, the pressure rod and the connecting block are movably connected through a pin shaft, the pressure rod extends to the outside of the connecting pipe on the side away from the connecting block, an extension rod is fixedly connected to the side of the pressure rod close to the connecting block, a push block is sleeved on the surface of the valve stem, the extension rod extends to the top of the push block on the side away from the connecting block, and a transmission structure is arranged on the front side of the valve body, and the transmission structure can drive the push block to rise and fall.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model extrude the push block through the transmission structure, and the push block slides on the surface of the valve stem and extrude the extension rod. The extension rod is squeezed and drives the pressure rod to swing with the pin shaft inside the connecting block as the axis. When the pressure rod is away from the side of the connecting block and contacts the surface of the connecting pipe, the connecting pipe is squeezed and installed. The utility model can improve the connection method of the existing stop valve, replace the connection through the threaded assembly, save the operation steps of squeezing through multiple threaded assemblies during the installation process, and prevent the stop valve from having an axial deviation.

[0015] 2. The utility model can promote the stable lifting and lowering of the extrusion block by arranging a connecting frame, a bidirectional screw, a screw sleeve and a crank. At the same time, the transmission efficiency of the bidirectional screw is high, which can avoid the phenomenon of rotation looseness.

[0016] 3. The utility model can limit the screw sleeve by setting a guide strip to prevent the screw sleeve from tilting during movement. The utility model can facilitate users to rotate the bidirectional screw by setting a nut, thereby improving the convenience of operation of the bidirectional screw. The utility model can improve the safety of the valve body and reduce the contact area between the transmission structure and the external environment by setting a baffle. The utility model can increase the contact area between the valve body and the connecting pipe by setting a limit ring to prevent the connecting pipe from axial deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the local structure of the utility model.

[0019] Figure 3It is a schematic diagram of the partial structure of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figures 1 to 3 As shown, the throttling stop valve of this embodiment includes a valve body 1, a valve stem 2 drivingly connected to the top of the valve body 1, a runner 3 fixedly connected to the top of the valve stem 2, a connecting pipe 4 connected to both sides of the valve body 1, and a positioning structure 5 is provided on the surface of the valve body 1. The positioning structure 5 includes a connecting block 6 arranged at the top of the valve body 1, the connecting block 6 is fixedly connected to the valve body 1, and a pressure rod 7 is arranged on the front and back of the connecting block 6. The pressure rod 7 is movably connected to the connecting block 6 through a pin shaft, and the side of the pressure rod 7 away from the connecting block 6 extends to the outside of the connecting pipe 4, and the side of the pressure rod 7 close to the connecting block 6 is fixedly connected to an extension rod 8, and the surface of the valve stem 2 is sleeved with a push block 9, and the side of the extension rod 8 away from the connecting block 6 extends to the top of the push block 9, and the front of the valve body 1 is provided with a transmission structure 10, which can drive the push block 9 to rise and fall.

[0022] refer to Figure 3 The transmission structure 10 includes a connecting frame 11 fixedly connected to the front face of the valve body 1, a bidirectional screw 12 is movably connected to the interior of the connecting frame 11 through a bearing, a screw sleeve 13 is threadedly connected to the left and right sides of the surface of the bidirectional screw 12, a crank 14 is movably connected to the front face of the screw sleeve 13 through a pin, the crank 14 extends from the side of the screw sleeve 13 away from the screw sleeve 13 to the front face of the push block 9, and the crank 14 and the push block 9 are movably connected through a pin.

[0023] This embodiment can promote the stable lifting and lowering of the extrusion block by providing the connection frame 11, the bidirectional screw 12, the screw sleeve 13 and the crank 14. At the same time, the bidirectional screw 12 has high transmission efficiency and can avoid the phenomenon of rotation looseness.

[0024] refer to Figure 3 A guide bar 15 is fixedly connected to the interior of the connecting frame 11 . The guide bar 15 extends from one side of the connecting frame 11 to the interior of the screw sleeve 13 . The screw sleeve 13 and the guide bar 15 are slidably connected.

[0025] In this embodiment, the guide strip 15 is provided to limit the screw sleeve 13 and prevent the screw sleeve 13 from tilting during the movement.

[0026] refer to Figure 3 The left and right ends of the bidirectional screw rod 12 both penetrate the connection frame 11 and extend to the outside of the connection frame 11 , and the left and right ends of the bidirectional screw rod 12 are fixedly connected with nuts 16 .

[0027] In this embodiment, by providing the nut 16 , it is convenient for the user to rotate the bidirectional screw 12 , thereby improving the convenience of operating the bidirectional screw 12 .

[0028] refer to Figure 1 A baffle 17 is fixedly connected to the bottom of the connecting frame 11 . The baffle 17 extends from one side of the connecting frame 11 to the front side of the connecting frame 11 . The transmission structure 10 is located between the baffle 17 and the valve body 1 .

[0029] In this embodiment, by providing the baffle 17 , the safety of the valve body 1 can be improved and the contact area between the transmission structure 10 and the external environment can be reduced.

[0030] refer to Figure 2 The left and right sides of the valve body 1 are fixedly connected with a limit ring 18, the limit ring 18 is arranged around the outside of the connecting pipe 4, and the limit ring 18 and the connecting pipe 4 are slidably connected.

[0031] In this embodiment, by providing the limiting ring 18 , the contact area between the valve body 1 and the connecting pipe 4 can be increased, thereby preventing the connecting pipe 4 from axial deviation.

[0032] The utility model moves the connecting pipe 4 to the inside of the limit ring 18, and then uses a tool to rotate the nut 16. The nut 16 carries the bidirectional screw 12 to rotate. The bidirectional screw 12 uses the thread to push the screw sleeve 13 to move toward each other. During the movement of the screw sleeve 13, the crank 14 is used to squeeze the push block 9. The push block 9 slides on the surface of the valve stem 2 and squeezes the extension rod 8. The extension rod 8 is squeezed and drives the pressure rod 7 to swing with the pin shaft inside the connecting block 6 as the axis. When the pressure rod 7 extends away from the side of the connecting block 6 to the inside of the limit ring 18 and contacts the surface of the connecting pipe 4, the effect of squeezing, installing and connecting the connecting pipe 4 is achieved.

Claims

1. A throttling stop valve, characterized in that: The throttling stop valve comprises a valve body (1); A valve stem (2) drivingly connected to the top of the valve body (1); A rotating wheel (3) fixedly connected to the top end of the valve stem (2); A connecting pipe (4) connected to both sides of the valve body (1); A positioning structure (5) is provided on the surface of the valve body (1); The positioning structure (5) comprises a connecting block (6) arranged on the top of the valve body (1), the connecting block (6) being fixedly connected to the valve body (1), a pressure rod (7) being arranged on the front and back sides of the connecting block (6), the pressure rod (7) being movably connected to the connecting block (6) via a pin, the side of the pressure rod (7) away from the connecting block (6) extending to the outside of the connecting pipe (4), the side of the pressure rod (7) close to the connecting block (6) being fixedly connected to an extension rod (8), a push block (9) being sleeved on the surface of the valve stem (2), the side of the extension rod (8) away from the connecting block (6) extending to the top of the push block (9), and a transmission structure (10) being arranged on the front side of the valve body (1), the transmission structure (10) being capable of driving the push block (9) to rise and fall.

2. A throttling stop valve according to claim 1, characterized in that: The transmission structure (10) comprises a connection frame (11) fixedly connected to the front face of the valve body (1); a bidirectional screw (12) is movably connected to the interior of the connection frame (11) via a bearing; a screw sleeve (13) is threadedly connected to the left and right sides of the surface of the bidirectional screw (12); a crank (14) is movably connected to the front face of the screw sleeve (13) via a pin; a side of the crank (14) away from the screw sleeve (13) extends to the front face of the push block (9); and the crank (14) and the push block (9) are movably connected via a pin.

3. A throttling stop valve according to claim 2, characterized in that: A guide bar (15) is fixedly connected to the interior of the connection frame (11), and a side of the guide bar (15) away from the connection frame (11) extends to the interior of the screw sleeve (13), and the screw sleeve (13) and the guide bar (15) are slidably connected.

4. A throttling stop valve according to claim 3, characterized in that: The left end and the right end of the bidirectional screw rod (12) both penetrate the connection frame (11) and extend to the outside of the connection frame (11), and the left end and the right end of the bidirectional screw rod (12) are both fixedly connected to a nut (16).

5. A throttling stop valve according to claim 4, characterized in that: A baffle (17) is fixedly connected to the bottom of the connection frame (11); the baffle (17) extends from a side away from the connection frame (11) to the front side of the connection frame (11); and the transmission structure (10) is located between the baffle (17) and the valve body (1).

6. A throttling stop valve according to claim 1, 2 or 5, characterized in that: The left and right sides of the valve body (1) are both fixedly connected to a limit ring (18), the limit ring (18) is arranged around the outside of the connecting pipe (4), and the limit ring (18) and the connecting pipe (4) are slidably connected.

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