阅读说明：本技术 一种高低温化工流程泵 (High-low temperature chemical process pump ) 是由 傅凡一 赵欣泰 郭文彬 于 2019-09-19 设计创作，主要内容包括：本发明公开了一种高低温化工流程泵一种高低温化工流程泵,包括泵体,所述泵体的上端设置有排水管,所述排水管通过连接法兰和螺栓、螺母配合与外接水管连接,所述排水管的侧壁上均匀固定安装有折管,所述折管的斜管设置于排水管的上方,且折管的斜管内部滑动设置有活塞,所述活塞的侧面焊接有推杆。该化工流程泵,通过泵体内产生的压力通过推杆对外接管和排水管的连接法兰进行压紧,减轻螺栓的承压力,避免螺栓螺母松动,并且随着泵体内部压力的增强使得推杆对连接法兰的压紧力增强,保证排水管与外接管之间的密封性。(The invention discloses a high-low temperature chemical process pump, which comprises a pump body, wherein a drain pipe is arranged at the upper end of the pump body, the drain pipe is connected with an external water pipe through the matching of a connecting flange, a bolt and a nut, bent pipes are uniformly and fixedly arranged on the side wall of the drain pipe, an inclined pipe of each bent pipe is arranged above the drain pipe, a piston is arranged inside the inclined pipe of each bent pipe in a sliding manner, and a push rod is welded on the side surface of the piston. This chemical process pump compresses tightly the flange of taking over and drain pipe outward through the push rod through the pressure that produces in the pump body, alleviates the bearing capacity of bolt, avoids bolt and nut not hard up to along with the reinforcing of pump body internal pressure makes the push rod strengthen the packing force of flange, guarantee the leakproofness between drain pipe and the external pipe.)

1. The utility model provides a high low temperature chemical industry process pump, includes the pump body (1), its characterized in that: the upper end of the pump body (1) is provided with a drain pipe (2), the drain pipe (2) is connected with an external water pipe (4) through the cooperation of a connecting flange (3) and a bolt and a nut, a pipe (5) is folded to even fixed mounting on the side wall of the drain pipe (2), the inclined pipe of the pipe (5) is arranged above the drain pipe (2), a piston (6) is arranged inside the inclined pipe of the pipe (5) in a sliding mode, and a push rod (7) is welded to the side face of the piston (6).

2. The high and low temperature chemical process pump according to claim 1, wherein: the side of the connecting flange (3) at the end part of the external pipe is fixedly provided with a rubber pressing block (8) corresponding to the push rod (7), and the side of the rubber pressing block (8) opposite to the push rod (7) is an arc surface.

3. The high and low temperature chemical process pump according to claim 2, wherein: stepped holes (9) are formed in the rubber pressing block (8), fastening bolts (10) are arranged on the inner sides of the stepped holes (9), and the fastening bolts (10) penetrate through the stepped holes (9) to be in threaded connection with threaded holes in the side faces of the end connecting flanges (3) of the drain pipes (2).

4. The high and low temperature chemical process pump according to claim 1, wherein: the side wall of the drain pipe (2) is evenly provided with three folding pipes (5), and a vertical pipe of each folding pipe (5) is fixedly connected with a connecting flange (3) of the drain pipe (2) through a fixing frame (11).

5. The high and low temperature chemical process pump according to claim 4, wherein: the inner side wall of the inclined tube of the folding tube (5) is welded with a limiting ring (12).

6. The high and low temperature chemical process pump according to claim 5, wherein: the outer surface of the piston (6) is coated with epoxy resin paint.

Technical Field

The invention belongs to the technical field of process pump equipment, and particularly relates to a high-low temperature chemical process pump.

Background

The chemical process pump is a general name of various pumps in the chemical production process. The pump has the advantages of high configuration power, high rotating speed, small integral volume, simple structure and convenient maintenance, but has high temperature, easy abrasion and large maintenance coefficient. The chemical process pumps are very diverse and can be divided into vane pumps such as centrifugal pumps, axial flow pumps, mixed flow pumps, partial flow pumps, vortex pumps and the like according to the action principle; positive displacement pumps, such as reciprocating pumps (including plunger pumps, piston pumps, diaphragm pumps, etc.); rotary pumps (including screw pumps, liquid ring pump gear pumps, sliding vane pumps, roots pumps, radial plunger pumps, etc.); other types of pumps may be classified as high pressure methylamine pumps, cryogenic pumps, phosphoric acid slurry pumps, etc., depending on the process or product characteristics.

In the actual work of the process pump, the connecting flange of the external connecting pipe and the drain pipe of the pump body is fixedly connected through the matching of the bolt and the nut, the pressure inside the pump body impacts the external connecting pipe and the drain pipe, the bolt and the nut between the connecting pipe and the drain pipe are easy to loosen after long-term use, the leakage condition is caused, the maintenance frequency is increased, and the problems are solved through the targeted design.

Disclosure of Invention

The invention aims to provide a high-low temperature chemical process pump which is put into use to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high low temperature chemical industry process pump, includes the pump body, the upper end of the pump body is provided with the drain pipe, the drain pipe passes through flange and bolt, nut cooperation and external water piping connection, even fixed mounting has a pipe on the lateral wall of drain pipe, the pipe chute of rolling over the pipe sets up in the top of drain pipe, and rolls over the inside piston that slides of pipe chute, the side welding of piston has the push rod.

Preferably, the side of the connecting flange at the end part of the external pipe is fixedly provided with a rubber pressing block corresponding to the push rod, and the side of the rubber pressing block opposite to the push rod is an arc surface.

Preferably, a stepped hole is formed in the rubber pressing block, a fastening bolt is arranged on the inner side of the stepped hole, and the fastening bolt penetrates through the stepped hole to be in threaded connection with a threaded hole in the side face of the end part connecting flange of the drain pipe.

Preferably, the side wall of the drain pipe is uniformly provided with three folding pipes, and the vertical pipes of the folding pipes are fixedly connected with the connecting flange of the drain pipe through a fixing frame.

Preferably, the inner side wall of the pipe folding inclined pipe is welded with a limiting ring.

Preferably, the outer surface of the piston is coated with an epoxy resin paint.

The invention has the technical effects and advantages that: this high low temperature chemical industry process pump, when pump body internal pressure risees gradually, the inside of the inside fluid flow of the pump body is in the inside of rolling over the pipe, promote the piston and slide in the inside of rolling over the pipe chute, drive the connecting flange of the outside takeover tip of push rod and press and hold, make the connecting flange of outer takeover and drain pipe compress tightly, alleviate bolt and nut's pressure-bearing, avoid the not hard up condition of bolt and nut after long-term the use, the interval of extension staff's periodic maintenance, and the push rod can change along with the pressure in the pump body to the pressure holding power of connecting flange, guarantee bolt and nut atress constancy relatively, service life has been guaranteed, the leakproofness stability between drain pipe and the outer takeover connecting flange is strong.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the connection between the bellows and the piston;

FIG. 3 is a sectional view of the connection of the rubber press block and the connecting flange.

In the figure: 1. a pump body; 2. a drain pipe; 3. a connecting flange; 4. is externally connected with a water pipe; 5. folding the tube; 6. a piston; 7. a push rod; 8. pressing rubber blocks; 9. a stepped hole; 10. fastening a bolt; 11. a fixed mount; 12. a limit ring.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a high-low temperature chemical process pump as shown in figures 1-3, which comprises a pump body 1, wherein a drain pipe 2 is arranged at the upper end of the pump body 1, the drain pipe 2 is matched with an external water pipe 4 through a connecting flange 3 and a bolt and a nut, a folding pipe 5 is uniformly and fixedly arranged on the side wall of the drain pipe 2, an inclined pipe of the folding pipe 5 is arranged above the drain pipe 2, a piston 6 is arranged in the inclined pipe of the folding pipe 5 in a sliding manner, a push rod 7 is welded on the side surface of the piston 6, when the internal pressure of the pump body 1 is gradually increased, fluid in the pump body 1 flows into the folding pipe 5 to push the piston 6 to slide in the inclined pipe of the folding pipe 5, the push rod 7 is driven to press and hold the connecting flange 3 at the end part of an external connecting pipe and the drain pipe 2, the pressure bearing of a bolt and a nut is reduced, and the condition that the bolt and the nut, the interval of regular maintenance of staff is prolonged.

The fixed rubber briquetting 8 that is provided with and corresponds with push rod 7 in the flange 3 side of external pipe tip, and rubber briquetting 8 is the cambered surface with the relative side of push rod 7, avoids the tip direct extrusion of push rod 7 to flange 3's side, causes push rod 7 or flange 3 damage, guarantees that push rod 7 carries out stable pressure through extrusion rubber briquetting 8 to flange 3 and holds.

Stepped hole 9 has been seted up to rubber briquetting 8's inside, the inboard of stepped hole 9 is provided with fastening bolt 10, fastening bolt 10 passes stepped hole 9 and the screw hole threaded connection of drain pipe 2 end connection flange 3 side, guarantees that rubber briquetting 8 passes through the stable fixed to flange 3 of fastening bolt 10 to avoid under the extrusion of push rod 7, the condition that the inferior quick follow flange 3 of rubber drops.

Evenly be provided with three on the lateral wall of drain pipe 2 and roll over pipe 5, roll over 3 fixed connection of standpipe through mount 11 and drain pipe 2 of pipe 5, guarantee that three push rod 7 on rolling over 5 upper portions compresses tightly the flange 3 of taking over outward simultaneously, guarantee flange 3's atress balance, and through mount 11 strengthen roll over the joint strength between pipe 5 and the drain pipe 2, avoid push rod 7 when too strong to drain pipe 2's flange 3 pressure, the condition of pipe 5 deformation is rolled over to the assembly.

And a limiting ring 12 is welded on the inner side wall of the inclined pipe of the folded pipe 5 to limit the moving path of the piston 6 in the folded pipe 5.

The outer surface of the piston 6 is coated with epoxy resin paint, so that the wear resistance and corrosion resistance of the piston 6 are improved, and the service life is prolonged.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.