WO2018036267A1

WO2018036267A1 - Manual piston valve apparatus capable of respectively sealing upper and lower valve seat

Info

Publication number: WO2018036267A1
Application number: PCT/CN2017/090700
Authority: WO
Inventors: 付正凯
Original assignee: 赛洛克流体设备成都有限公司
Priority date: 2016-08-26
Filing date: 2017-06-29
Publication date: 2018-03-01
Also published as: CN106195309A

Abstract

A manual piston valve apparatus capable of respectively sealing an upper and lower valve seat, comprising a handle (1), a support frame (3), a valve rod (4), a valve body (5), and a flow channel (10), and also comprising a push rod (2) and a valve seat (6), the push rod being connected to the support frame by means of a screw thread structure; guidance and stability are good, and the valve seat uses PEEK material; a flow channel hole (7), an attenuating groove (8), and a plug hole (9) are arranged on the valve seat, the flow channel hole being disposed in the valve seat along the axial direction of the flow channel, the plug hole being disposed along the axial direction of the valve rod, and the attenuating groove being disposed in a direction perpendicular to the flow channel hole and the plug hole; the valve seat enables the valve operating torque to be reduced and the valve seat parts above and below the flow channel hole can be sealed respectively with the valve body; valve stability is high and guidance is good.

Description

Manual plunger valve device capable of sealing upper and lower valve seats respectively

Technical field

The invention relates to a plunger valve device, in particular to a manual plunger valve device capable of sealing the upper and lower valve seats respectively.

Background technique

The plunger valve is a closing member or a plunger-shaped rotary valve that opens or closes by opening or closing the passage port on the valve plug by rotating 90 degrees. The plug of the plunger valve may be cylindrical or conical in shape. In a cylindrical valve plug, the passage is generally rectangular; in a tapered valve plug, the passage is trapezoidal. These shapes make the structure of the plunger valve light, but at the same time cause some loss. Plunger valves are best suited for use as a shut-off and closing medium as well as for shunting, but can sometimes be used for throttling depending on the nature of the application and the erosion resistance of the sealing surface. The plunger valve uses a plug body with a through hole as a valve for the opening and closing member. The plug body rotates with the valve stem to achieve the opening and closing action. Small, unfilled plunger valves are also known as "Cock". The plug body of the plunger valve is mostly a cone, and cooperates with the conical hole surface of the valve body to form a sealing pair. The plunger valve is the earliest type of valve, which has a simple structure, rapid switching and low fluid resistance. The ordinary plunger valve is sealed by the direct contact between the finished metal plug body and the valve body, so the sealing property is poor, the opening and closing force is large, and it is easy to wear, and can usually only be used for low pressure and small diameter. Plunger valves are widely used in oilfield mining, transportation and refining equipment, and are also widely used in petrochemical, chemical, gas, natural gas, liquefied petroleum gas, HVAC industry and general industry.

The existing plunger valve is in the upper half of the flow passage hole and the valve seat in the lower half of the flow passage hole cannot be sealed separately, and sometimes the sealing is not good.

Summary of the invention

The technical problem to be solved by the present invention is that the conventional structure is in the upper half of the flow passage hole and the valve seat in the lower half of the flow passage hole cannot be separately sealed, and the purpose is to provide a manual plunger valve device capable of sealing the upper and lower valve seats respectively. Solve the problem that both the upper half of the valve seat and the lower half of the flow path hole need to be sealed and sealed, which is difficult to be squeezed by the lower stem.

The invention is achieved by the following technical solutions:

A manual plunger valve device capable of sealing the upper and lower valve seats respectively, comprising a handle, a bracket, a valve stem, a valve body and a flow passage, characterized in that the utility model further comprises a push rod and a valve seat; the handle is perpendicular to the push rod axis and the push rod end The connecting rod is connected with the bracket in the axial direction of the bracket by a threaded structure, the bracket is connected to the valve body above the valve body, the valve body is a cylindrical structure, the middle cylindrical cavity forms a flow passage, and the other end of the push rod is One end of the valve stem is connected, and a valve seat is arranged at the intersection of the stem axis and the flow passage. The valve seat can reduce the operating torque of the valve, and the push rod moves up and down by the action of the handle, the push rod drives the lifting and lowering of the valve stem, and the valve stem and the valve seat are controlled to be sealed or disconnected, thereby achieving the purpose of disconnecting and connecting the fluid. Thread structure orientation Well, the equipment has high stability, and the surface of the bracket has a convex structure for convenient fixing.

The handle adopts a rotating handle, and the handle shaft is machined with a square hole. Since the push rod and the bracket are connected by a thread structure, the handle adopts a rotating handle to better meet the work requirement, and is labor-saving and convenient.

The push rod and the handle are connected to one end and processed with a square shaft, and the square shaft is connected with the square hole of the handle. The square shaft is connected with the square hole, the connection is stable, and it is not easy to slip when rotating.

One end of the push rod and the valve stem is provided with a slot hole, the slot hole is provided with a card shoot, one end of the valve stem extends into the slot of the push rod, and the valve rod is provided with a card slot and a card shoot on the push rod. Since the push rod is screwed to the bracket during operation, the valve stem needs to be rotated, and the valve stem only needs to move up and down with the push rod without rotating. The above structure can ensure that the push rod and the valve stem rotate relative to each other in the horizontal direction and cannot be in the axis. Free relative movement in the direction.

The utility model further comprises a runner hole, a weakening groove and a blocking hole, wherein the valve seat has a flow channel hole along the axial direction of the flow channel, and a hole is blocked along the axial direction of the valve stem, and the hole is blocked by the flow channel hole and the vertical hole. There is a weakening groove in the direction. The weakened valve seat can further reduce the valve operating torque, and at the same time, the valve seat above and below the flow passage hole can be separately sealed with the valve body.

The seat material is PEEK. PEEK has low creep modulus, high modulus of elasticity, excellent friction performance, special wear resistance, resistance to various media, FDA-approved, non-toxic, very excellent chemical resistance and flame retardant.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

1. A manual plunger valve device capable of sealing the upper and lower valve seats respectively, has a special valve seat, and the valve operating torque is small, and at the same time, the valve seat above and below the flow passage hole can be separately sealed with the valve body;

2. A manual plunger valve device capable of sealing the upper and lower valve seats respectively, the push rod and the bracket are screwed, the guiding property is good, and the stability is high;

3. A manual plunger valve device capable of sealing the upper and lower valve seats respectively. The valve seat is made of PEEK material with low creep variable, high elastic modulus, excellent friction performance, special wear resistance and resistance to erosion by various media.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are not intended to limit the embodiments of the invention. In the drawing:

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a three-view view of the valve seat structure

Marked and corresponding part names in the drawing:

1-handle, 2-push, 3-bracket, 4-valve, 5-valve, 6-valve, 7-channel hole, 8-weak groove, 9-plug hole, 10-flow channel.

detailed description

The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. As a limitation of the invention.

Example 1

As shown in Fig. 1 and Fig. 2, a manual plunger valve device capable of sealing the upper and lower valve seats respectively comprises a handle 1, a bracket 3, a valve stem 4, a valve body 5, a flow passage 10, a push rod 2, and a valve seat 6; The handle 1 adopts a rotating handle with a diameter of 30 cm, and is connected to one end of the push rod 2 perpendicularly to the axis of the push rod 2. The push rod 2 is 30 cm long and 6 cm in diameter, and is connected with the bracket 3 in the axial direction of the bracket 3 by a threaded structure. The bracket 3 is 50 cm high and connected. Vertically above the valve body 5, the valve body 5 has a cylindrical structure, a length of 60 cm, an outer diameter of 20 cm, an inner diameter of 8 cm, an intermediate cylindrical cavity forming a flow path 10, and the other end of the push rod 2 and the valve stem 4 is connected at one end, the valve stem has a length of 30cm and a diameter of 6cm, and one end of the push rod 2 and the valve stem 4 is provided with a slot hole, the slot hole is provided with a card shoot, and one end of the valve stem 4 extends into the slot of the push rod 2, The valve stem 4 is provided with a card slot and cooperates with the card on the push rod 2. During the working process, the push rod 2 and the valve stem 4 are relatively rotated in the horizontal direction and cannot move freely in the axial direction. A valve seat 6 is disposed at the intersection of the axis of the valve stem 4 and the flow passage 10. The valve seat 6 is made of PEEK material, and the valve seat 6 is provided with a flow passage hole 7, a weakening groove 8 and a blocking hole 9, and the diameter of the flow passage hole is 7.5 cm. The hole diameter is 6cm, the groove width is 1.5cm and the depth is 6cm. The valve seat 6 has a flow hole 7 in the axial direction of the flow channel 10, and a hole 9 is opened along the axial direction of the valve stem 4, and the flow hole 7 is vertically A weakening groove 8 is opened in the direction of the plugging hole 9.

The specific embodiments of the present invention have been described in detail with reference to the preferred embodiments of the present invention. All modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A manual plunger valve device capable of sealing upper and lower valve seats respectively, comprising a handle (1), a bracket (3), a valve stem (4), a valve body (5), and a flow passage (10), characterized in that it further comprises a push Rod (2), valve seat (6); handle (1) is perpendicular to the axis of the push rod (2) and is connected to one end of the push rod (2), and the push rod (2) adopts a threaded structure along the axis of the bracket (3) and the bracket ( 3) Connection, the bracket (3) is connected above the valve body (5) perpendicular to the valve body (5), the valve body (5) is a cylindrical structure, and the intermediate cylindrical cavity forms a flow passage (10), the push rod The other end of (2) is connected to one end of the valve stem (4), and a valve seat (6) is provided at the intersection of the stem (4) axis and the flow passage (10).
The manual plunger valve device capable of sealing the upper and lower valve seats respectively according to claim 1, wherein the handle (1) adopts a rotating handle, and the handle shaft is machined with a square hole.
The manual plunger valve device capable of sealing the upper and lower valve seats respectively according to claim 2, wherein the push rod (2) and the handle (1) are connected to one end and the square shaft, the square shaft and the handle are processed. ) square hole connection.
The manual plunger valve device capable of sealing the upper and lower valve seats respectively according to claim 3, wherein one end of the push rod (2) and the valve stem (4) is provided with a slot, and the slot opening is provided with The bamboo shoots, one end of the valve stem (4) protrudes into the slot of the push rod (2), and the valve stem (4) is provided with a card slot and cooperates with the card shoot on the push rod (2).
The manual plunger valve device capable of being respectively sealed by the upper and lower valve seats according to claim 1, further comprising a valve seat (6) provided with a flow passage hole (7), a weakening groove (8) and a plug The hole (9) and the valve seat (6) have a flow passage hole (7) along the axial direction of the flow passage (10), and a plug hole (9) is opened along the axial direction of the valve stem (4), and the flow passage hole is vertically ( 7) A weakened groove (8) is opened in the direction of the plugging hole (9).
The manual plunger valve device capable of sealing the upper and lower valve seats respectively according to claim 1, wherein the valve seat (6) is made of PEEK.