CN209800765U - Flashboard stop gear for gate valve - Google Patents

Abstract

The utility model relates to a flashboard stop gear for gate valve, gate valve are including valve body, disk seat, the flashboard that has the valve pocket, the valve rod and the flashboard stop gear be connected with the flashboard, be equipped with inlet, the liquid outlet with the valve pocket intercommunication on the valve body, the flashboard includes two symmetrical arrangement's flashboard monomer, the disk seat has two and corresponds the cooperation with the flashboard monomer, the valve pocket bottom is equipped with the recess under the flashboard, the recess is located between two disk seats, stop gear is including being located limiting plate and the spring of recess, the both ends of spring are connected with the downside of limiting plate and the tank bottom of recess respectively, and the flashboard is located the intercommunicating pore that liquid outlet one side was equipped. When the gate valve needs to be closed, the valve rod is driven to move downwards, and the valve rod drives the flashboard to move downwards. When flashboard and disk seat contact, the pressure reduction of limiting plate upside, the spring promotes the limiting plate and goes upward to make the limiting plate play limiting displacement to the flashboard, prevent that the flashboard from excessively descending.

Description

Flashboard stop gear for gate valve

Technical Field

The utility model relates to a gate valve field especially relates to a flashboard stop gear for gate valve.

Background

The gate valve is a slide valve with a closing member being a gate plate, and comprises a valve body, a valve seat, a gate plate, a valve rod connected with the gate plate and a driving mechanism for driving the valve rod and the gate plate to act. At present, the structure for limiting and guiding the flashboard in the gate valve is a guide rib positioned on the valve body.

If, disclose a flashboard direction limit structure of plate valve in the chinese utility model patent that the publication number is CN201866305U, this plate valve's flashboard direction limit structure includes valve body, valve gap, flashboard, valve rod, support, driver, and valve body and valve gap coaxial arrangement, the flashboard is installed to the valve rod lower extreme in the valve body, is equipped with the disk seat in the valve body, and this disk seat is sealed with the flashboard laminating, and the valve rod adopts the driver drive, respectively installs a bulb stopper at two side end face middle part mirror symmetry of flashboard. However, the machining precision of the guide ribs is not high, the limit and guide gaps of the gate plate are not well controlled, or the gap is too large to play a limiting role, or the gap is too small to enable the gate plate to be installed. Because partial valve body inner chamber size is less to the direction muscle on the valve body is difficult to machine tooling, can't play the limiting displacement to the flashboard.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a flashboard stop gear for gate valve to solve the technical problem that the flashboard stop gear effect is poor for the gate valve among the prior art.

the utility model discloses a flashboard stop gear's for gate valve technical scheme is:

The utility model provides a flashboard stop gear for gate valve, gate valve are including valve body, disk seat, the flashboard that has the valve pocket, valve rod and the flashboard stop gear be connected with the flashboard, be equipped with inlet, the liquid outlet with the valve pocket intercommunication on the valve body, the flashboard includes two symmetrical arrangement's flashboard monomer, the disk seat has two and corresponds the cooperation with the flashboard monomer, the valve pocket bottom is equipped with the recess under the flashboard, the recess is located between two disk seats, stop gear is including being located limiting plate and the spring of recess, the both ends of spring are connected with the downside of limiting plate and the tank bottom of recess respectively, the flashboard is located liquid outlet one side and is equipped with the intercommunicating.

The beneficial effects are that: have the utility model discloses a when flashboard stop gear's for gate valve used, the gate valve was in when the state of opening, and the liquid compression limiting plate was down, and when the elasticity of spring was equal with the fluid pressure of limiting plate upside, the limiting plate was in balanced state. When the gate valve needs to be closed, the valve rod is driven to move downwards, and the valve rod drives the flashboard to move downwards. After flashboard and disk seat sealed, the liquid of liquid outlet reduces, and the pressure of limiting plate upside reduces, and the spring promotes the limiting plate and goes upward to with flashboard downside looks butt, thereby play the limiting displacement to the flashboard, prevent that the flashboard from excessively descending, reduce the sealed effect of flashboard and disk seat.

Further, be equipped with rubber seal on the disk seat, be equipped with the rubber pad with rubber seal complex on the flashboard. Set up rubber seal on the disk seat, set up the rubber pad on the flashboard, help strengthening the sealed effect of gate valve.

Further, the orifice of the communication hole close to the liquid outlet is positioned on the upper side of the other orifice.

Furthermore, the upper ends of the two gate plate monomers enclose a dovetail groove, and the lower end of the valve rod is provided with a dovetail joint matched with the dovetail groove. The flashboard is connected with the valve rod through a dovetail groove and a dovetail joint, so that the connection is facilitated.

Further, the upper side width of the flashboard is larger than the lower side width of the flashboard. The upper side width of flashboard is greater than the downside width of flashboard, is convenient for open and close the floodgate.

Further, the liquid inlet and the liquid outlet are coaxially arranged.

Drawings

Fig. 1 is a partial sectional view of a gate valve having a gate plate position-limiting mechanism for a gate valve according to the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

In the figure: 1-a valve body; 2-a gate plate; 21-a shutter monomer; 22-a communication hole; 23-a dovetail groove; 24-rubber pad; 3-a valve stem; 31-dovetail joint; 4-valve seat; 41-rubber sealing ring; 5-a limiting plate; 6-spring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The utility model discloses a flashboard stop gear's for gate valve embodiment one, as shown in fig. 1, fig. 2, valve rod 3 and flashboard stop gear that the gate valve is connected including valve body 1, disk seat 4, flashboard 2 that have the valve pocket, with flashboard 2.

Specifically, the left side of the valve body 1 is provided with a liquid inlet communicated with the valve cavity, the right side of the valve body 1 is provided with a liquid outlet communicated with the valve cavity, and the axes of the liquid outlet and the liquid inlet are positioned on the same straight line. The gate plate 2 comprises two gate plate single bodies 21 which are symmetrical left and right, and the two gate plate single bodies 21 are fixedly connected. The upper ends of the two gate single bodies 21 enclose a dovetail groove 23 with an upward opening, and the lower end of the valve rod 3 is provided with a dovetail 31 matched with the dovetail groove 23. The valve rod 3 is connected with the gate plate through a dovetail groove 23 and a dovetail 31 on the valve rod.

The shutter 2 includes two shutter monomers 21, and correspondingly, the valve seat 4 has two, and the two valve seats 4 are matched with the corresponding shutter monomers 21. The valve body 1 is provided with a groove under the flashboard 2, and the groove is located between the two valve seats 4. Flashboard stop gear is including being located limiting plate 5 and the spring 6 of recess, and limiting plate 5 extends along the axis direction of inlet, liquid outlet, and both ends and the internal face contact of recess about limiting plate 5, the both ends of spring 6 respectively with the downside of limiting plate 5 and the tank bottom fixed connection of recess for exert ascending effort to limiting plate 5. One side that the flashboard 2 is located the liquid outlet hole is provided with the intercommunicating pore 22 that communicates with the recess, and in this embodiment, the lower extreme of two flashboard monomers 21 encloses into the cavity of opening orientation, and intercommunicating pore 22 communicates with the cavity.

In this embodiment, the valve seat 4 has a rubber seal 41, and the shutter is provided with a rubber pad 24 that is matched with the rubber seal 41, so as to enhance the sealing performance between the shutter and the valve seat 4.

Install the utility model discloses a when flashboard stop gear's gate valve used, when the gate valve was in the state of opening, the fluid compression limiting plate 5 that gets into in the gate valve went down, and when the pressure that 5 upsides of limiting plate bore was equal with the elasticity of the spring 6 of 5 downside of limiting plate, limiting plate 5 keep balance. When the gate valve needs to be closed, the hand wheel is rotated to drive the valve rod 3 to move downwards, the gate plate moves downwards along with the valve rod 3, the rubber pad 24 on the gate plate is matched and sealed with the rubber sealing ring 41, liquid on the outlet side is gradually reduced, and the pressure on the upper side of the limiting plate 5 is reduced. The spring 6 pushes the limiting plate 5 to move upwards and is abutted against the lower side of the flashboard, so that the flashboard is limited, and the rubber gasket 24 is prevented from being separated from the rubber sealing ring 41 of the valve seat 4 due to excessive downward movement of the flashboard.

The utility model discloses a flashboard stop gear's for gate valve embodiment two, with the difference part of flashboard stop gear's for gate valve embodiment one, inlet and the setting of liquid outlet disalignment in this embodiment. The rest is the same as the first embodiment, and is not described again.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a flashboard stop gear for gate valve, gate valve is including valve body, disk seat, the flashboard that has the valve pocket, the valve rod and the flashboard stop gear be connected with the flashboard, be equipped with inlet, the liquid outlet with the valve pocket intercommunication on the valve body, the flashboard includes two symmetrical arrangement's flashboard monomer, the disk seat has two and corresponds cooperation, its characterized in that with the flashboard monomer: the utility model discloses a liquid outlet valve, including valve chamber, limiting mechanism, liquid outlet, recess, valve chamber bottom is equipped with the recess under the flashboard, the recess is located between two disk seats, limiting mechanism is including limiting plate and the spring that is located the recess, the both ends of spring are connected with the downside of limiting plate and the tank bottom of recess respectively, the flashboard is located liquid outlet one side and is equipped with the intercommunicating pore with the recess intercommunication.

2. The gate plate stopper mechanism for gate valves according to claim 1, wherein: the valve seat is provided with a rubber sealing ring, and the flashboard is provided with a rubber pad matched with the rubber sealing ring.

3. The gate plate stopper mechanism for gate valves according to claim 1 or 2, wherein: the orifice of the communication hole close to the liquid outlet is positioned on the upper side of the other orifice.

4. The gate plate stopper mechanism for gate valves according to claim 1 or 2, wherein: the upper ends of the two flashboard monomers enclose a dovetail groove, and the lower end of the valve rod is provided with a dovetail joint matched with the dovetail groove.

5. The gate plate stopper mechanism for gate valves according to claim 1 or 2, wherein: the upper side width of flashboard is greater than the downside width of flashboard.

6. The gate plate stopper mechanism for gate valves according to claim 1 or 2, wherein: the liquid inlet and the liquid outlet are coaxially arranged.