CN215487670U

CN215487670U - Soft seal welding type external thread stop valve

Info

Publication number: CN215487670U
Application number: CN202121606804.8U
Authority: CN
Inventors: 姚忠兴
Original assignee: Yangzhong Kangxin Electric Instrument Complete Set Co ltd
Current assignee: Yangzhong Kangxin Electric Instrument Complete Set Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-01-11
Anticipated expiration: 2031-07-15

Abstract

The utility model discloses a soft seal welding type external thread stop valve, relating to the technical field of stop valves and comprising a valve body, the top of the valve body is in threaded connection with a valve rod, the bottom end of the valve rod is fixedly connected with a valve core, the valve core comprises a shell, the bottom of the shell is provided with an inner groove, the inner part of the inner groove is nested with a plastic block, the conical valve core is changed into a cylinder shape, the flow area of an inner flow passage of the valve body is increased, when some hybrids exist in the liquid, the blocking of a flow passage in the stop valve is not easy to cause, the plastic block is made of polyether-ether-ketone, and the polyether-ether-ketone has the characteristics of high temperature resistance, chemical corrosion resistance, high pressure resistance, self lubrication, wear resistance and fatigue resistance, and is longer in service life.

Description

Soft seal welding type external thread stop valve

Technical Field

The utility model relates to the technical field of stop valves, in particular to a soft seal welding type external thread stop valve.

Background

The stop valve is a tool which makes the sealing surface of the valve clack and the sealing surface of the valve seat tightly fit by the pressure of a valve rod to prevent medium from flowing, belongs to a forced sealing valve and is one of the most widely used valves.

Publication number CN206246688U discloses an external screw thread stop valve, including valve body, valve rod and case, be provided with the runner in the valve body, be provided with the seal mouth in the runner, valve rod drive valve core inserts the cutting off that the seal mouth constitutes the runner, the relative place ahead that the fluid flow direction lies in the case of runner is provided with protecting against shock mechanism, protecting against shock mechanism includes protecting against shock board and buffer spring, protecting against shock board articulates in the runner top and flagging naturally, buffer spring presses and locates between runner wall and the protecting against shock board, resets protecting against shock board below. By adopting the scheme, the utility model provides the external thread stop valve which reduces the impact of fluid on the valve core and prolongs the service life.

However, the valve core of the stop valve is conical like the conventional external thread stop valve, but the conical valve core has the defects that when the stop valve is opened for use, the flow area of the flow passage is reduced, and when some mixed fluid exists in the liquid, the internal flow passage of the stop valve is easily blocked.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a soft seal welding type external thread stop valve.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a soft sealing welding formula external screw thread stop valve, includes the valve body, the top threaded connection of valve body has the valve rod, the bottom fixedly connected with case of valve rod, the case includes the shell, the inside groove has been seted up to the bottom of shell, the inside nestification of inside groove has the plastic pellet, the top of valve body is located the upper surface of case and has placed the packing pad, the gland has been placed to the upper surface of packing pad, gland has been placed to the upper surface of gland, the top outer wall threaded connection of valve body has the gland nut, the takeover has all been cup jointed at the both ends of valve body, the equal threaded connection in both ends of valve body has second lid type nut.

Preferably, the outer wall of the top of the valve rod is sleeved with a hand wheel, and the top end of the valve rod is in threaded connection with a first cover-shaped nut.

Preferably, the gland nut, the packing gland, the sealing filler and the packing gasket are all sleeved with the valve rod, and the sealing filler is reinforced polytetrafluoroethylene.

Preferably, the top outer wall of shell is provided with the external screw thread, the top inner wall of valve body is provided with the internal thread, the outer wall of shell and the inner wall threaded connection of valve body.

Preferably, the shell and the plastic block are both cylindrical, the size of the inner groove is matched with that of the plastic block, and the plastic block is made of polyether-ether-ketone.

Preferably, the second cover-shaped nut is sleeved with the connecting pipe, and sealing gaskets are sleeved on the outer walls of the two ends of the valve body.

The utility model has the beneficial effects that: in the utility model, the valve core of the traditional stop valve is conical, the conical valve core is changed into a cylinder, the flow area of the internal flow passage of the valve body is increased, when some hybrids exist in the liquid, the internal flow passage of the stop valve is not easy to be blocked, and the plastic block is made of polyether-ether-ketone which has the characteristics of high temperature resistance, chemical corrosion resistance, high pressure resistance, self-lubrication, wear resistance and fatigue resistance, and the service life is longer.

Drawings

Fig. 1 is a schematic structural diagram of a soft seal welding type external thread stop valve of the utility model.

Fig. 2 is a schematic structural diagram of a valve core of a soft seal welding type external thread stop valve of the utility model.

FIG. 3 is a schematic structural diagram of a housing, an inner groove and a plastic block of the soft seal welding type external thread stop valve of the utility model.

Reference numbers in the figures: 1. a valve body; 2. a hand wheel; 3. a valve stem; 4. a gland nut; 5. a packing gland; 6. sealing and filling; 7. a filler pad; 8. a valve core; 801. a housing; 802. an inner tank; 803. a plastic block; 9. a first cap nut; 10. a gasket; 11. a second cap nut; 12. and (6) taking over.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example (b):

as shown in figures 1 to 3:

the utility model provides a soft seal welding formula external screw thread stop valve, including valve body 1, the top threaded connection of valve body 1 has valve rod 3, the bottom fixedly connected with case 8 of valve rod 3, case 8 includes shell 801, inside groove 802 has been seted up to shell 801's bottom, the inside nestification of inside groove 802 has plastic pellet 803, packing pad 7 has been placed to the upper surface that the top of valve body 1 is located case 8, packing pad 7's upper surface has placed packing 6, packing gland 5 has been placed to packing 6's upper surface, the top outer wall threaded connection of valve body 1 has gland nut 4, the both ends of valve body 1 have all been cup jointed and have been taken over 12, the equal threaded connection in both ends of valve body 1 has second lid type nut 11.

The top outer wall of valve rod 3 has cup jointed hand wheel 2, and the top threaded connection of valve rod 3 has first lid type nut 9.

Gland nut 4, gland 5, gland 6, gasket 7 all cup joint each other with valve rod 3, and gland 6 is reinforcing polytetrafluoroethylene, through gland 5, gland 6, gasket 7's design, can prevent that liquid from leaking, has improved the leakproofness.

The top outer wall of shell 801 is provided with the external screw thread, and the top inner wall of valve body 1 is provided with the internal thread, and the outer wall of shell 801 and the inner wall threaded connection of valve body 1.

The outer shell 801 and the plastic block 803 are both cylindrical, the size of the inner groove 802 is matched with that of the plastic block 803, the plastic block 803 is made of polyether-ether-ketone, the polyether-ether-ketone is a high polymer formed by a repeating unit containing one ketone bond and two ether bonds in a main chain structure, belongs to a special high polymer material, and has the characteristics of high temperature resistance, chemical corrosion resistance, high pressure resistance, self lubrication, wear resistance, fatigue resistance and the like.

The second cover nut 11 and the connecting pipe 12 are sleeved with each other, the outer walls of the two ends of the valve body 1 are sleeved with the sealing gaskets 10, and liquid is prevented from leaking through the sealing gaskets 10.

The specific use mode and function of the embodiment are as follows:

when the stop valve is used, the hand wheel 2 drives the valve rod 3 to rotate, the valve rod 3 drives the valve core 8 to move downwards, when the plastic block 803 at the bottom of the valve core 8 is contacted with the bottom flow channel of the valve body 1, the stop valve is in a flow stopping state, when the valve core 8 rises, the shell 801 is separated from the bottom flow channel and the right flow channel of the valve body 1, the valve body 1 is opened, and at the moment, liquid flows out through the flow channel of the valve body 1;

the utility model is different from the traditional stop valve in that the valve core 8 of the traditional stop valve is conical, the conical valve core 8 is changed into a cylinder shape, the flow area of the internal flow passage of the valve body 1 is increased, when some hybrids exist in the liquid, the internal flow passage of the stop valve is not easy to block, the plastic block 803 is made of polyether-ether-ketone, and the polyether-ether-ketone has the characteristics of high temperature resistance, chemical corrosion resistance, high pressure resistance, self lubrication, wear resistance and fatigue resistance, and has longer service life.

The structure and process are described with reference to FIGS. 1-3.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A soft seal welding type external thread stop valve comprises a valve body (1) and is characterized in that, the top of the valve body (1) is in threaded connection with a valve rod (3), the bottom end of the valve rod (3) is fixedly connected with a valve core (8), the valve core (8) comprises a shell (801), an inner groove (802) is arranged at the bottom of the shell (801), a plastic block (803) is nested in the inner groove (802), a packing pad (7) is arranged on the top of the valve body (1) and positioned on the upper surface of the valve core (8), the upper surface of the packing gasket (7) is provided with a sealing packing (6), the upper surface of the sealing packing (6) is provided with a packing gland (5), the outer wall of the top of the valve body (1) is connected with a gland nut (4) in a threaded manner, the two ends of the valve body (1) are sleeved with connecting pipes (12), and the two ends of the valve body (1) are in threaded connection with second cover-shaped nuts (11).

2. The soft seal welding type external thread stop valve according to claim 1, characterized in that a hand wheel (2) is sleeved on the outer wall of the top of the valve rod (3), and a first cover-shaped nut (9) is connected to the top end of the valve rod (3) in a threaded manner.

3. The soft seal welding type external thread stop valve according to claim 1, wherein the gland nut (4), the packing gland (5), the sealing packing (6) and the packing gasket (7) are all sleeved with the valve rod (3), and the sealing packing (6) is reinforced polytetrafluoroethylene.

4. The soft seal welding type external thread stop valve according to claim 1, characterized in that the outer wall of the top of the shell (801) is provided with external threads, the inner wall of the top of the valve body (1) is provided with internal threads, and the outer wall of the shell (801) is in threaded connection with the inner wall of the valve body (1).

5. The soft seal welding type external thread stop valve according to claim 1, wherein the outer shell (801) and the plastic block (803) are both cylindrical, the size of the inner groove (802) is matched with that of the plastic block (803), and the plastic block (803) is made of polyether ether ketone.

6. The soft seal welding type external thread stop valve according to claim 1, wherein the second cap nut (11) and the connecting pipe (12) are sleeved with each other, and sealing gaskets (10) are sleeved on the outer walls of two ends of the valve body (1).