CN204573236U - A kind of explosion-proof valve based on guide structure - Google Patents

Abstract

The utility model belongs to the technical field of valve equipment, in particular to an explosion-proof valve based on a pilot structure, which includes a valve body, a valve cover is fixedly connected above the valve body, and an adjustable probe is arranged in the middle of the valve cover. The valve cover is provided with a spring adjustment knob, the lower end of the spring adjustment knob is fixedly connected with a spring pressure plate, and the lower surface of the spring pressure plate is fixedly connected with a spring, and the internal gap of the valve body is equipped with a valve core. The core is provided with a spring fixing counterbore, and the lower end surface of the spring is fixedly connected to the spring fixing counterbore; the middle part of the valve core is provided with a pilot hole, and the pilot hole is provided with a bursting disc fixing knob. A bursting disc is provided on the upper surface of the disc fixing knob, and a bursting disc pressing knob is threaded on the bursting disc fixing knob; a valve core sealing ring is provided between the valve core and the valve body.

Description

An explosion-proof valve based on pilot structure

technical field

The utility model belongs to the technical field of valve equipment, in particular to an explosion-proof valve based on a pilot structure.

Background technique

The valve is a control component in the pipeline fluid delivery system. It is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow relief. Valves used for fluid control range from the simplest shut-off valve to various valves used in extremely complex automatic control systems. Valves for industrial pipelines. The control of the valve can adopt a variety of transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electro-hydraulic, electro-hydraulic, gas-hydraulic, spur gear, bevel gear drive, etc.; can be driven by pressure, temperature Under the action of sensing signals in other forms, it acts according to predetermined requirements, or simply opens or closes without relying on sensing signals. The valve relies on driving or automatic mechanism to make the opening and closing parts lift, slide, swing or rotate. Movement, thereby changing the size of its flow channel area to realize its control function. According to relevant data, with the acceleration of the reorganization of the valve industry, the future industry will be the competition between the quality and safety of valve products and product brands. Products will develop in the direction of high technology, high parameters, strong corrosion resistance, and long life. Only through Continuous technological innovation, development of new products, and technological transformation can gradually improve the technical level of products, meet the needs of domestic equipment, and fully realize the localization of valves. Under the huge demand environment, my country's valve manufacturing industry will surely show a better development prospect. With the continuous development of society and the needs of production and life, pipelines are being developed and used by all walks of life. Due to the excessive internal pressure of the pipeline, the pipeline is prone to burst, and the safety cannot be guaranteed.

With the continuous development of mechanical modernization, corresponding explosion-proof valves have emerged accordingly. However, there are many types of explosion-proof valves in the market, and it is still difficult to meet the increasingly high production environment requirements. For example, Chinese patent 201310100721.5 discloses an electric explosion-proof valve, which is characterized in that it includes a valve, a valve stem connected to the valve, and an electric actuator that controls and connects the valve stem. An explosion-proof mechanism of the actuator, the explosion-proof mechanism includes an explosion-proof cavity and a control device arranged in the explosion-proof cavity. Although the above mechanism has certain advantages, the overall structure is relatively complicated and requires external energy consumption, and the response speed is not fast enough, which greatly affects the scope and effect of production and use.

Contents of the invention

The utility model provides an anti-explosion valve based on a pilot structure to solve the problems of insufficient flexibility of the overall structure and insufficient response in the above-mentioned background technology.

The technical problems solved by the utility model are achieved by the following technical solutions: the utility model provides an explosion-proof valve based on a pilot structure, including a valve body, a valve cover is fixedly connected above the valve body, and a valve cover is installed in the middle of the valve cover. There is an adjustable probe, the adjustable probe is threadedly connected to the valve cover, the valve cover is provided with a spring adjustment knob, and the spring adjustment knob is threaded to the valve cover, The lower end surface of the spring adjustment knob is fixedly connected with a spring pressure plate, the spring adjustment knob and the spring pressure plate are threaded, the lower surface of the spring pressure plate is fixedly connected with a spring, and the lower surface of the spring pressure plate is connected to the spring. The upper end surfaces are connected by welding, the valve body is provided with a spool in a clearance fit, the spool is provided with a spring fixing counterbore, and the lower end surface of the spring is fixedly connected to the spring fixing counterbore. The fixed counterbore of the spring is connected to the lower end surface of the spring by welding; the middle part of the valve core is provided with a pilot hole, and the pilot hole is provided with a bursting disc fixing knob, and the bursting disc fixing knob is connected to the pilot hole. Threaded connection, the upper surface of the bursting disc fixing knob is provided with a bursting disc, and the threaded connection of the bursting disc fixing knob is provided with a bursting disc pressing knob; a valve core sealing ring is provided between the valve core and the valve body ; The lower end face of the valve body is provided with an inlet, and the right end face of the valve body is provided with an outlet.

The utility model is further configured as follows: the valve cover is provided with a threaded hole A threadedly connected with the spring adjustment knob, the threaded holes A are evenly arranged in the circumferential direction of the valve cover, and the number of the threaded holes A is 4; the bonnet is provided with a threaded hole B that is threadedly connected with the adjustable probe, and the number of the threaded hole B is 1; the fixed connection between the valve body and the bonnet is provided with a connection screw.

The utility model is further configured as follows: the valve core is provided with a valve core sealing ring groove matching with the valve core sealing ring; the middle of the bursting disc fixing knob is provided with a through hole A, and the bursting disc is pressed in the middle of the knob. Through hole B is provided.

The beneficial effects of the utility model are:

1. By setting adjustable probes and bursting discs in this patent, not only can the bursting pressure be controlled by adjusting the elongation length of the adjustable probes, but also the bursting discs can be punctured by the adjustable probes through the pressure expansion of the bursting discs, thereby The pilot function is realized, and the mechanism is more simple, flexible and practical; at the same time, setting the bursting disc fixing knob and the bursting disc pressing knob can realize the simple and fast installation and reliable pressing of the bursting disc, avoiding one-time use and greatly increasing the service life.

2. This patent sets a pilot hole on the spool, skillfully utilizes the pressure difference to realize the rapid lifting of the spool, thereby realizing rapid pressure relief, without using external energy consumption, faster response speed, more flexible and energy-saving mechanism design.

3. By setting a spring and a spring adjustment knob between the valve core and the valve cover, and setting a valve core sealing ring on the valve core, the good airtightness of the valve core to the valve body can be effectively realized and the working quality can be guaranteed.

4. The utility model has unique structure, convenient operation, excellent function and good market prospect.

Description of drawings

Fig. 1 is a structural schematic diagram of the closed state of the explosion-proof valve core of the utility model.

Fig. 2 is a structural schematic diagram of the pilot puncture state of the explosion-proof valve core of the utility model.

Fig. 3 is a structural schematic diagram of an open state of the explosion-proof valve core of the utility model.

Fig. 4 is a structural schematic diagram of the explosion-proof valve of the utility model viewed from above.

Fig. 5 is a schematic diagram of the assembly structure of the bursting disc of the explosion-proof valve of the present invention.

Below in conjunction with accompanying drawing, the utility model is further described:

In the figure: 1-valve body, 2-pilot hole, 3-bonnet, 4-connecting screw, 5-spring adjustment knob, 6-adjustable probe, 7-spring pressure plate, 8-spring, 9-spring fixing sink Hole, 10-inlet, 11-outlet, 12-bursting disc, 13-bursting disc fixing knob, 14-spool sealing ring, 15-spool, 16-bursting disc pressing knob.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.

Example:

As shown in Figure 1, Figure 2, Figure 3, Figure 4, and Figure 5, this embodiment includes a valve body 1, a valve cover 3 is fixedly connected above the valve body 1, and an adjustable probe 6 is provided in the middle of the valve cover 3. The threaded connection between the adjustable probe 6 and the valve cover 3, the spring adjustment knob 5 is provided on the valve cover 3, the thread connection between the spring adjustment knob 5 and the valve cover 3, the lower end surface of the spring adjustment knob 5 is fixedly connected with a The spring pressure plate 7, the spring adjustment knob 5 and the spring pressure plate 7 are threadedly connected, the lower surface of the spring pressure plate 7 is fixedly connected with a spring 8, the lower surface of the spring pressure plate 7 and the upper end surface of the spring 8 are connected by welding, and the internal clearance of the valve body 1 is matched. A spool 15 is provided, the spool 15 is provided with a spring fixed counterbore 9, the lower end surface of the spring 8 is fixedly connected to the spring fixed counterbore 9, and the spring fixed counterbore 9 and the lower end surface of the spring 8 are connected by welding; There is a pilot hole 2 in the middle of the spool 15, and a bursting disc fixing knob 13 is arranged on the pilot hole 2, and the bursting disc fixing knob 13 is threadedly connected with the pilot hole 2, and a bursting disc 12 is arranged on the upper surface of the bursting disc fixing knob 13, and the bursting disc A bursting disc pressing knob 16 is threaded on the fixed knob 13; a valve core sealing ring 14 is provided between the valve core 15 and the valve body 1; Exit 11 is provided.

The utility model is further configured as follows: the valve cover 3 is provided with a threaded hole A threadedly connected with the spring adjustment knob 5, the threaded holes A are evenly arranged in the circumferential direction of the valve cover 3, and the number of threaded holes A is 4; There is a threaded hole B threadedly connected with the adjustable probe 6, and the number of the threaded hole B is one; a connecting screw 4 is fixedly connected between the valve body 1 and the valve cover 3 .

The utility model is further configured as follows: the valve core 15 is provided with a valve core sealing ring groove cooperating with the valve core sealing ring 14; a through hole A is provided in the middle of the bursting disc fixing knob 13, and a through hole is provided in the middle of the bursting disc pressing knob 16 b.

In actual use, first adjust the extension length of the adjustable probe 6 and the spring adjustment knob 5 according to the critical value of the explosion-proof pressure, the spool 15 moves downward under the force of the spring 8, and finally reaches a balanced state, and the spool seal ring 14 Guarantee the good sealing of the inlet 10 and outlet 11 of the valve body 1; when the pressure inside the inlet 10 increases, the bursting disc 12 on the bursting disc fixing knob 13 expands, and when it expands to a certain arc, it is pierced by the adjustable probe 6 Therefore, the pressure at the inlet 10 is quickly released from the pilot hole 2, and the equilibrium state of the valve core 15 is broken, so that under the force of the spring 8 and the force of the pressure difference between the upper and lower sides of the valve core 15, the valve core 15 produces an up and down pressure. Shaking, the valve core sealing ring 14 on the valve core 15 is separated from the inlet port 10, and a new equilibrium state is quickly formed to realize complete pressure relief; when it is used for the second time, it is only necessary to twist off the bursting disc compression knob 16 and replace it with a new one. After the bursting disc 12, tighten the bursting disc compression knob 16 again.

Utilize the technical solution described in the utility model, or those skilled in the art design similar technical solutions under the inspiration of the technical solution of the utility model, and achieve the above-mentioned technical effect, all fall into the protection scope of the utility model .

Claims (3)

1. the explosion-proof valve based on guide structure, it is characterized in that: comprise valve body (1), described valve body (1) top is fixedly connected with and is provided with valve gap (3), adjustable probe (6) is provided with in the middle of described valve gap (3), described adjustable spy (6) pin with between described valve gap (3) for being threaded, described valve gap (3) is provided with spring adjusting knob (5), described spring adjusting knob (5) with between described valve gap (3) for being threaded, described spring adjusting knob (5) lower end surface is fixedly connected with and is provided with spring bearer plate (7), described spring adjusting knob (5) and described spring bearer plate (7) are for being threaded, described spring bearer plate (7) lower surface is fixedly connected with and is provided with spring (8), for being weldingly connected between described spring bearer plate (7) lower surface and described spring (8) upper-end surface, the cooperation of described valve body (1) internal void is provided with spool (15), described spool (15) is provided with spring and fixes counterbore (9), described spring (8) lower end surface is fixedly connected on described spring and fixes on counterbore (9), described spring is fixed between counterbore (9) and described spring (8) lower end surface as being weldingly connected, described spool (15) middle part is provided with pilot hole (2), described pilot hole (2) is provided with rupture disk fixed knob (13), described rupture disk fixed knob (13) and described pilot hole (2) are for being threaded, described rupture disk fixed knob (13) upper surface is provided with rupture disk (12), described rupture disk fixed knob (13) is threaded and is provided with rupture disk compression knob (16), valve core seal ring (14) is provided with between described spool (15) and described valve body (1), described valve body (1) below end face is provided with import (10), and described valve body (1) its right end face is provided with outlet (11).

2. a kind of explosion-proof valve based on guide structure according to claim 1, it is characterized in that: described valve gap (3) is provided with the tapped hole A be threaded with described spring adjusting knob (5), described tapped hole A is circumferentially evenly arranged at described valve gap (3), and described tapped hole A number is 4; Described valve gap (3) is provided with the tapped hole B be threaded with described adjustable probe (6), and described tapped hole B number is 1; Be fixedly connected with between described valve body (1) with described valve gap (3) and be provided with attachment screw (4).

3. a kind of explosion-proof valve based on guide structure according to claim 1, is characterized in that: described spool (15) is provided with the seal spool ring recess coordinated with described valve core seal ring (14); Be provided with through hole A in the middle of described rupture disk fixed knob (13), described rupture disk compresses in the middle of knob (16) and is provided with through hole B.