Labor-saving operation of a luer stopcock valve

Abstract

The application relates to a labor-saving thread port stop valve, belonging to the technical field of valves, which comprises a valve body with two open ends in the axial direction, a valve seat integrally connected to the middle part of the valve body, and a plunger movably installed in the valve body, a regulating seat is vertically connected to the middle part of the valve body, a hand wheel is rotationally connected to the top of the regulating seat, the hand wheel is screw-threadedly provided with a valve rod with one end connected to the plunger along the axis, the valve seat is provided with a through hole with a top end and a bottom end respectively communicated with the inlet and the outlet of the valve body, the plunger comprises a valve cover rotationally arranged at the bottom of the valve rod and an auger rotationally arranged at the other side of the valve cover, a plurality of fan-shaped pressure relief holes are arranged on the valve cover in the circumferential direction, sealing covers are rotationally arranged at the positions of the pressure relief holes, movable connecting assemblies are arranged between the sealing covers and the auger, and the valve body is provided with locking devices for rotationally limiting the sealing covers. The application can greatly reduce the resistance received by the plunger when the thread port stop valve is opened and closed, so that the opening and closing operation of the valve body is more labor-saving.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a threaded gate valve that requires less effort to operate. Background Technology

[0002] A gate valve is a type of valve that controls the flow of fluid or regulates its flow rate by vertically moving a valve disc (or plunger) along the centerline of the valve seat. The valve body has a spherical internal structure and is one of the most widely used valve types in industrial piping systems. A threaded gate valve, as a type of gate valve, is named for the threaded connection between its inlet and outlet and the pipeline. The working principle of a threaded gate valve is basically the same as that of a regular gate valve: a valve seat connecting the inlet and outlet is located inside the valve body, and the valve disc (plunger) moves up and down via a handwheel to control the opening and closing of the valve seat.

[0003] Because the valve disc (plunger) blocks the valve seat opening by moving up and down and pressing, the valve disc is affected by water pressure when opening and closing, making it difficult for the valve disc or plug to move. Operators often need to use a lot of force to drive the valve disc (plunger) to move, which often results in difficult operation. Utility Model Content

[0004] To address the problem of difficulty in moving the valve disc or plunger due to water pressure during the adjustment of threaded stop valves, and to make valve adjustment more convenient and labor-saving, this application provides a threaded stop valve that is easy to operate.

[0005] The threaded stop valve that requires less effort to operate provided in this application adopts the following technical solution:

[0006] A threaded gate valve with easy operation includes a valve body with openings at both ends along its axis, a valve seat integrally connected to the middle of the valve body, and a plunger movably installed inside the valve body. An adjusting seat is vertically connected to the middle of the valve body, and a handwheel is rotatably connected to the top of the adjusting seat. A valve stem, with one end connected to the plunger, is threaded through the handwheel along its axis. The valve seat has through holes at its top and bottom communicating with the inlet and outlet of the valve body, respectively. The plunger includes a valve cover rotatably mounted at the bottom of the valve stem and an auger rotatably mounted on the other side of the valve cover to reduce resistance when the valve cover moves. The valve cover has several fan-shaped pressure relief holes circumferentially through it, and sealing caps for closing the pressure relief holes are rotatably mounted at each of the pressure relief holes. Movable connecting components connect the sealing caps to the auger. When the auger rotates forward, the sealing caps open the pressure relief holes; conversely, they close the pressure relief holes when rotating backward. The valve body is provided with a locking device for limiting the rotation of the sealing caps.

[0007] Optionally, the movable connection assembly includes a connection shaft rotatably sleeved on the top of the auger, a connection flange connected to the other end of the connection shaft, a connection plate movably installed in the valve cover, and tension springs connecting the connection flange and the connection plate at both ends respectively. A plurality of sealing covers are circumferentially connected to the connection plate. The connection flange is abutted against the inner wall of the valve cover away from the valve stem, and a plurality of connection contacts are circumferentially connected on the side near the connection plate. A plurality of connection grooves corresponding to the connection contacts are circumferentially opened on the side of the connection plate near the connection flange.

[0008] Optionally, a slope is provided on the same side wall of several of the connecting grooves, and there is a gap between the bottom of the slope and the bottom of the connecting groove, and the gap distance is less than the radius of the connecting contact point.

[0009] Optionally, the locking device includes a push ring disposed at the end of the valve stem away from the handwheel, a plurality of forward locking blocks integrally connected circumferentially to the connecting plate on the side away from the connecting flange, and a plurality of reverse locking blocks integrally embedded circumferentially inside the valve cover. The plurality of forward locking blocks and the plurality of reverse locking blocks have the same shape and move and abut against each other. The push ring is slidably disposed between the connecting flange and the connecting plate inside the valve cover along the axis of the valve cover and can be embedded in the connecting plate. The inner ring of the push ring is threadedly connected to the end of the valve stem. The valve cover has a non-circular structure.

[0010] Optionally, the valve seat has a coaxial stepped hole at the end of the through hole near the adjusting seat, and the valve cover has a rubber ring plug around its edge at the end near the auger, the rubber ring plug being adapted to the size of the stepped hole.

[0011] Optionally, the auger includes a central shaft and a spiral blade integrally wound on the central shaft, the spiral blade abutting against the inner wall of the through hole on the valve seat.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] When opening and closing the stop valve, this application can drive the auger on the plunger to rotate through fluid, thereby effectively reducing the pressure of water flow on the valve cover when the valve cover moves up and down, making the operation of turning the handwheel of the stop valve easier and less strenuous, and improving the operation convenience of the stop valve.

[0014] In this application, the auger located on the plunger can rotate the fluid during the fluid flow process, which makes up for the disadvantage that the fluid transmission speed is slowed down due to the inconsistency of the inlet and outlet directions of the valve body or the occurrence of height error, so that the fluid flows more smoothly in the valve. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of a threaded gate valve that is easy to operate according to this application.

[0016] Figure 2 yes Figure 1 Cross-sectional view at point AA.

[0017] Figure 3 This is an exploded view of the internal structure of a threaded gate valve that requires less effort to operate, as described in this application.

[0018] Figure 4 This is an overall view of the connection disc of a threaded gate valve that requires less effort to operate, as described in this application.

[0019] Figure 5 This is a cross-sectional view of the internal structure of the valve cover of a threaded gate valve that requires less effort to operate, as described in this application.

[0020] Figure 6 yes Figure 2 A magnified view of point A in the middle.

[0021] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Inlet; 12. Outlet; 13. Adjusting seat; 131. Handwheel; 132. Valve stem; 2. Valve seat; 21. Through hole; 22. Stepped hole; 3. Piston; 31. Valve cover; 311. Pressure relief hole; 312. Rubber ring plug; 32. Screwdriver; 321. Central shaft; 322. Helical blade; 4. Movable connecting assembly; 41. Connecting shaft; 42. Connecting flange; 421. Connecting contact; 43. Connecting disc; 431. Sealing cover; 432. Connecting groove; 4321. Ramp; 44. Tension spring; 5. Locking device; 51. Push ring; 52. Forward locking block; 53. Reverse locking block. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0023] This application discloses a threaded stop valve that is easy to operate.

[0024] Reference Figure 1 and Figure 2 A threaded gate valve for easy operation includes a valve body 1 with an inlet 11 and an outlet 12 at both ends along its axis, a valve seat 2 integrally connected to the middle of the valve body 1, and a plunger 3 movably installed inside the valve body 1 along a direction perpendicular to the axis of the valve body 1 for blocking fluid flow. An adjusting seat 13 is integrally connected vertically to the middle of the valve body 1, and a handwheel 131 is rotatably mounted on the top of the adjusting seat 13. A valve stem 132 is drively connected between the handwheel 131 and the plunger 3. When the handwheel 131 rotates, it drives the plunger 3 to move up and down. The valve seat 2 has a through hole 21 that matches the size of the plunger 3, and the top and bottom ends of the through hole 21 communicate with the inlet 11 and outlet 12 of the valve body 1, respectively.

[0025] Reference Figure 2 Furthermore, the plunger 3 includes a valve cover 31 rotatably mounted at the bottom of the valve stem 132 and an auger 32 rotatably connected to the valve cover 31 on the side away from the valve stem 132. The auger 32 extends into the valve inlet 11 pipe. When fluid enters the valve from the inlet 11, it fills the space where the auger 32 is placed. At this time, moving the plunger 3 up and down can cause the fluid to drive the auger 32 to rotate. In this case, the inertial rotation generated between the auger 32 and the fluid will greatly reduce the resistance of the fluid to the auger 32, making the operation of opening the valve more convenient and effortless.

[0026] Reference Figure 2 and Figure 3 Furthermore, the valve cover 31 has an internally hollow structure and is provided with several fan-shaped pressure relief holes 311 spaced apart circumferentially. Several synchronously rotating sealing covers 431 are rotatably mounted inside the valve cover 31. The size of the sealing covers 431 is slightly larger than the pressure relief holes 311, used to close the pressure relief holes 311. A movable connecting assembly 4 connects the sealing covers 431 to the auger 32, so that when the valve is closed, the auger 32 can drive the sealing covers 431 to slowly close, achieving continuous pressure relief of the fluid to ensure that the plunger 3 can move up and down smoothly and conveniently, saving the operator's effort.

[0027] Reference Figure 3 and Figure 4 Specifically, the movable connection assembly 4 includes a connecting shaft 41 rotatably sleeved on the top of the auger 32, a connecting flange 42 connected to the other end of the connecting shaft 41, a connecting plate 43 movably installed inside the valve cover 31, and a tension spring 44 connecting the connecting flange 42 and the connecting plate 43 at both ends respectively. The connecting shaft 41 extends into the valve cover 31, and both the connecting flange 42 and the connecting plate 43 are located within the valve cover 31, with the connecting flange 42 always in contact with the inner wall of the valve cover 31 near the auger 32.

[0028] Several sealing caps 431 are integrally connected to the connecting plate 43 at equal intervals along the circumference. When the connecting plate 43 rotates, the sealing caps 431 can close or open several pressure relief holes 311. Specifically, the connecting flange 42 has several connecting contacts 421 integrally arranged along the circumference on the side near the connecting plate 43, and the connecting plate 43 also has several arc-shaped connecting grooves 432 opened along the circumference.

[0029] When the connecting plate 43 contacts the connecting flange 42, the auger 32 can drive the connecting plate 43 and the sealing cover 431 to rotate, thereby achieving the pressure relief operation of the fluid. The function of the tension spring 44 is mainly to ensure that the two can make contact, and at the same time to ensure that when the connecting flange 42 rotates continuously, the sealing cover 431 will not rotate synchronously with it.

[0030] Preferably, each of the connecting grooves 432 has a ramp 4321 on one end sidewall along the same rotation direction, so that the connecting contact 421 can more easily disengage from the connecting groove 432. There is a gap between the bottom of the ramp 4321 and the bottom of the connecting groove 432, and the gap distance is smaller than the radius of the connecting contact 421. This structural design allows the connecting flange 42 to better drive the connecting disc 43 to rotate.

[0031] Reference Figure 3 and Figure 5 In order to limit the rotation of the connecting plate 43 and the sealing cover 431, and to ensure that several pressure relief holes 311 are always closed without the influence of the screw conveyor 32 when the valve is closed, a locking device 5 is also provided in the valve body 1 to limit the rotation of the sealing cover 431 and the connecting plate 43.

[0032] The locking device 5 specifically includes a push ring 51 disposed at the end of the valve stem 132 away from the handwheel 131, and several positive locking blocks 52 integrally connected circumferentially to the side of the connecting plate 43 away from the connecting flange 42. The push ring 51 is slidably disposed between the connecting flange 42 and the connecting plate 43 inside the valve cover 31, and when the connecting flange 42 contacts the connecting plate 43, the push ring 51 can be completely retracted into the connecting plate 43.

[0033] The push ring 51 is threadedly connected to the valve stem 132. When the valve stem 132 is rotated, the push ring 51 is driven to move back and forth along the axis inside the valve cover 31. Several reverse locking blocks 53 are integrally connected circumferentially inside the valve cover 31. When the valve needs to be closed for a long time, the push ring 51 threadedly connected to the valve stem 132 can be moved upward by rotating the handwheel 131, which will drive the connecting plate 43 to move upward, so that the positive locking block 52 and the reverse locking block 53 on it abut against each other to prevent rotation. At the same time, this structure can also separate the connecting plate 43 from the connecting flange 42, ensuring that the connecting flange 42 will not drive the connecting plate 43 when it rotates.

[0034] Preferably, to prevent the valve cover 31 from rotating during the movement of the valve stem 132, which would prevent the push ring 51 from adjusting smoothly, the valve cover 31 is designed to be non-circular. Since the purpose of this structure is to prevent the valve cover 31 from rotating, any non-circular valve cover 31 can meet the requirements. For ease of understanding and to avoid narrowing the scope of protection for the shape of the valve cover 31, the valve cover 31 in the accompanying drawings of this application is circular but does not rotate.

[0035] Reference Figure 6Preferably, a stepped hole 22 is provided on the valve seat 2 at the end of the through hole 21 near the adjusting seat 13, and a rubber ring plug 312 that matches the size of the stepped hole 22 is wound around the end of the valve cover 31 near the auger 32. When the valve is closed, the rubber ring plug 312 on the valve cover 31 abuts against the side wall of the stepped hole 22, which can further prevent leakage and facilitate the up and down movement of the plunger 3.

[0036] Reference Figure 2 and Figure 6 Preferably, the auger 32 includes a central shaft 321 and a spiral blade 322 integrally wound around the central shaft 321, with the spiral blade 322 abutting against the inner wall of the through hole 21 on the valve seat 2. This structure facilitates the transmission of power from the fluid to the auger 32, resulting in less resistance when the auger 32 rotates.

[0037] The operating principle of the threaded stop valve that saves effort in this application embodiment is as follows:

[0038] When valve body 1 is opened, turning handwheel 131 will cause connecting plate 43 and connecting flange 42 to be tightly pressed together under the action of tension spring 44. At this time, during the process of opening plunger 3, auger 32 will rotate spontaneously under the action of fluid impact, and drive the sealing cover 431 on connecting plate 43 to open pressure relief hole 311, thereby making the rise of plunger 3 encounter less resistance.

[0039] At the same time, after the valve body 1 is opened, the fluid will continuously drive the auger 32 to rotate. Under the action of inertia, the auger 32 will also act as a turbine, driving the fluid to be transmitted more smoothly and alleviating the problem of discontinuous fluid delivery caused by the non-coaxiality of the inlet 11 and outlet 12.

[0040] When closing valve body 1, using handwheel 131 to move plunger 3 downward will cause auger 32 to rotate in the opposite direction. During this process, auger 32 will drive sealing cover 431 to slowly close pressure relief port 311, thus relieving pressure. Compared to the integrated plunger 3 structure, this structure of plunger 3 experiences less fluid resistance during movement, achieving the purpose of labor-saving operation.

[0041] Finally, when the handwheel 131 is tightened, the valve stem 132 drives the push rod and the connecting plate 43 to move through the threaded connection, so that the forward locking block 52 and the reverse locking block 53 abut against each other, thereby achieving complete closure of the pressure relief hole 311.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A threaded gate valve that is easy to operate, comprising a valve body (1) with openings at both ends along the axial direction, a valve seat (2) integrally connected to the middle of the valve body (1), and a plunger (3) movably installed inside the valve body (1), wherein an adjusting seat (13) is vertically connected to the middle of the valve body (1), and a handwheel (131) is rotatably connected to the top of the adjusting seat (13), and a valve stem (132) with one end connected to the plunger (3) is threaded through the handwheel (131) along the axial direction, characterized in that: The valve seat (2) has through holes (21) at its top and bottom, respectively communicating with the inlet (11) and outlet (12) of the valve body (1). The plunger (3) includes a valve cover (31) rotatably disposed at the bottom of the valve stem (132) and an auger (32) rotatably disposed on the other side of the valve cover (31) to reduce the resistance when the valve cover (31) moves. The valve cover (31) has several fan-shaped pressure relief holes (311) circumferentially through it. (311) Each of the valve body (1) is rotatably mounted with a sealing cover (431) for closing the pressure relief hole (311). Each of the sealing covers (431) is connected to the auger (32) by a movable connecting assembly (4). When the auger (32) rotates forward, the sealing covers (431) open the pressure relief hole (311), and vice versa. The valve body (1) is provided with a locking device (5) for limiting the rotation of the sealing covers (431).

2. The threaded stop valve for easy operation according to claim 1, characterized in that: The movable connection assembly (4) includes a connection shaft (41) rotatably sleeved on the top of the auger (32), a connection flange (42) connected to the other end of the connection shaft (41), a connection plate (43) movably installed in the valve cover (31), and a tension spring (44) connecting the connection flange (42) and the connection plate (43) at both ends respectively. A plurality of sealing caps (431) are circumferentially connected to the connection plate (43). The connection flange (42) is abutted against the inner wall of the valve cover (31) away from the valve stem (132), and a plurality of connection contacts (421) are circumferentially connected on the side near the connection plate (43). A plurality of connection grooves (432) corresponding to the connection contacts (421) are circumferentially opened on the side of the connection plate (43) near the connection flange.

3. The threaded stop valve for easy operation according to claim 2, characterized in that: A ramp (4321) is provided on the same side wall of several of the connecting grooves (432). There is a gap between the bottom of the ramp (4321) and the bottom of the connecting groove (432), and the gap distance is less than the radius of the connecting contact (421).

4. The threaded stop valve for easy operation according to claim 3, characterized in that: The locking device (5) includes a push ring (51) disposed at the end of the valve stem (132) away from the handwheel (131), a plurality of positive locking blocks (52) integrally connected to the side of the connecting plate (43) away from the connecting flange (42) along the circumference, and a plurality of reverse locking blocks (53) integrally embedded in the valve cover (31) along the circumference. The plurality of positive locking blocks (52) and the plurality of reverse locking blocks (53) have the same shape and move and abut against each other. The push ring (51) is slidably disposed between the connecting flange (42) and the connecting plate (43) in the valve cover (31) along the axis of the valve cover (31) and can be embedded in the connecting plate (43). The inner ring of the push ring (51) is threadedly connected to the end of the valve stem (132). The valve cover (31) has a non-circular structure.

5. The threaded stop valve for easy operation according to claim 4, characterized in that: The valve seat (2) has a coaxial stepped hole (22) at the end of the through hole (21) near the adjusting seat (13). The valve cover (31) is surrounded by a rubber ring plug (312) along the edge at the end near the auger (32). The rubber ring plug (312) is adapted to the size of the stepped hole (22).

6. The threaded stop valve for easy operation according to claim 5, characterized in that: The auger (32) includes a central shaft (321) and a spiral blade (322) integrally wound on the central shaft (321). The spiral blade (322) is in contact with the inner wall of the through hole (21) on the valve seat (2).

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