阅读说明：本技术 一种超高压柱塞泵的过载超压保护装置 (Overload and overpressure protection device of ultrahigh pressure plunger pump ) 是由 王海能 陈运生 康崇涛 马龙 沈家祯 李全兵 郑轶斌 张书民 常威 于 2019-10-29 设计创作，主要内容包括：一种超高压柱塞泵的过载超压保护装置,包括接头、爆破片、压头、保护盖、防护罩和密封圈,接头的外圆周上下两端部均设有外螺纹,接头的中心沿轴线方向开设有第一通孔,爆破片的下表面覆盖压设在接头的上端面,压头为圆管结构,压头的下端紧压在爆破片的上表面外边缘,保护盖螺纹连接在接头的顶部,压头的上端和保护盖的内侧顶部紧压接触,防护罩固定在保护盖的顶部,防护罩的内侧面与保护盖的外侧面之间具有间隙,保护盖的内侧顶部中心开设有的圆形凹槽,保护盖的上侧部外圆周沿周向开设有若干个第二通孔,接头的下端面中部开设有环形凹槽,密封圈匹配嵌设在环形凹槽。本发明设计科学、易于安装、结构简单、承压大、超压范围广。(An overload and overpressure protection device of an ultrahigh pressure plunger pump comprises a joint, a rupture disk and a pressure head, visor, protection casing and sealing washer, both ends all are equipped with the external screw thread about the outer circumference of joint, first through-hole has been seted up along the axis direction in the center of joint, the up end at the joint is pressed to the lower surface cover of rupture disc, the pressure head is the pipe structure, the lower extreme sticiss at the upper surface outside edge of rupture disc, visor threaded connection is at the top of joint, the upper end of pressure head and the inboard top of visor sticiss the contact, the top at the protection casing is fixed to the protection casing, the clearance has between the medial surface of protection casing and the lateral surface of visor, some circular recess have been seted up at the inboard top center of visor, a plurality of second through-hole has been seted up along circumference to the outer circumference of last side of visor, the annular groove has been seted up at the. The invention has scientific design, easy installation, simple structure, large bearing pressure and wide overpressure range.)

1. The utility model provides an excess load superpressure protection device of superhigh pressure plunger pump which characterized in that: the pressure head is of a circular tube structure, the lower end of the pressure head is tightly pressed on the outer edge of the upper surface of the rupture disk, the bottom of the protective cover is open, an internal thread matched with the external thread is arranged on the lower portion of an inner ring of the protective cover, the inner ring of the protective cover is in threaded connection with the top of the joint, the rupture disk and the pressure head are both positioned in the protective cover, the upper end of the pressure head is in tight pressing contact with the top of the inner side of the protective cover, the protective cover is fixed on the top of the protective cover, an annular gap is formed between the inner ring side surface of the protective cover and the outer circumferential surface of the protective cover, and the central lines of the joint, the rupture disk, the pressure head, the protective cover and the protective cover are overlapped, the inside top center of visor seted up with the pressure head hole circular recess that corresponds from top to bottom, the diameter of circular recess equals with the internal diameter of pressure head, the outer circumference of the last side of visor is seted up the second through-hole of a plurality of and circular recess intercommunication along circumference, each second through-hole all is located the protection casing inside, the lower terminal surface middle part of joint has seted up annular groove, the sealing washer matching is inlayed and is established in annular groove.

2. An excessive load and overpressure protection arrangement for an extra-high pressure plunger pump according to claim 1, characterized in that: the middle appearance of the joint and the lower appearance of the protective cover are both hexagonal prism structures, and the upper end edge of the hexagonal prism structure of the protective cover is positioned right below the annular gap.

3. An excessive load and overpressure protection arrangement for an extra-high pressure plunger pump according to claim 1, characterized in that: the outer edge of the top of the protective cover is provided with a step, the middle of the top of the protective cover is provided with a vertically through round hole, the round hole is sleeved on the periphery of the thin section of the top of the protective cover, the diameter of the round hole is the same as the diameter of the outer circumference of the step section of the top of the protective cover, and the surface of the top of the inner side of the protective cover is in compressed contact with the surface of the step.

4. An excessive load and overpressure protection arrangement for an extra-high pressure plunger pump according to claim 1, characterized in that: an air buffer annular cavity is arranged between the upper part of the inner circle of the protective cover and the middle lower part of the outer circumference of the pressure head, and a third through hole communicated with the air buffer annular cavity and the inner hole of the pressure head is formed in the side wall of the pressure head.

5. An excessive load and excessive pressure protection device of an extra-high pressure plunger pump according to any one of claims 1 to 4, characterized in that: the middle part of the rupture disk is of an upward convex spherical shell structure, the middle part of the upper end face of the joint is provided with an upward convex spherical structure, the lower surface of the spherical shell structure is buckled on the upper surface of the spherical structure, the spherical structure is provided with a square groove along the radial direction of the joint, and the square groove is communicated with the first through hole.

Technical Field

The invention relates to the technical field of ultrahigh pressure plunger pumps, in particular to an overload and overpressure protection device of an ultrahigh pressure plunger pump.

Background

At present, the overload and overpressure protection of the pump is realized in the technical field of ultrahigh pressure plunger pumps, mainly by adopting a safety valve with a spring or regulated by air pressure, or by using a pressure sensor for electric control protection. The safety valve generally bears small pressure, and can play a role in protection only by being adjusted to a certain pressure in advance, and the electrical control protection is usually complex in structure.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The invention aims to provide an overload and overpressure protection device of an ultrahigh pressure plunger pump, which is scientific in design, easy to install, simple in structure, large in pressure bearing and wide in overpressure range.

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

the overload overpressure protection device of the ultrahigh pressure plunger pump comprises a joint, a rupture disk, a pressure head, a protective cover and a sealing ring, wherein the central line of the joint is vertically arranged, external threads are arranged at the upper end part and the lower end part of the outer circumference of the joint, a first through hole is formed in the center of the joint along the axis direction, the lower surface of the rupture disk covers and is arranged on the upper end surface of the joint, the pressure head is of a circular tube structure, the lower end of the pressure head is tightly pressed on the outer edge of the upper surface of the rupture disk, the bottom of the protective cover is open, an internal thread matched with the external threads is arranged on the lower portion of an inner ring of the protective cover, the inner ring of the protective cover is in threaded connection with the top of the joint, the rupture disk and the pressure head are both positioned inside the protective cover, the upper, The center line coincidence of rupture disk, pressure head, visor and protection casing, the circular recess that corresponds from top to bottom with the pressure head hole is seted up at the inboard top center of visor, and the diameter of circular recess equals with the internal diameter of pressure head, and the second through-hole that a plurality of and circular recess communicate is seted up along circumference to the outer circumference of the last side of visor, and each second through-hole all is located inside the protection casing, and the lower terminal surface middle part of joint has seted up annular groove, and the sealing washer matches to inlay and establishes in annular groove.

The middle appearance of the joint and the lower appearance of the protective cover are both hexagonal prism structures, and the upper end edge of the hexagonal prism structure of the protective cover is positioned right below the annular gap.

The outer edge of the top of the protective cover is provided with a step, the middle of the top of the protective cover is provided with a vertically through round hole, the round hole is sleeved on the periphery of the thin section of the top of the protective cover, the diameter of the round hole is the same as the diameter of the outer circumference of the step section of the top of the protective cover, and the surface of the top of the inner side of the protective cover is in compressed contact with the surface of the step.

An air buffer annular cavity is arranged between the upper part of the inner circle of the protective cover and the middle lower part of the outer circumference of the pressure head, and a third through hole communicated with the air buffer annular cavity and the inner hole of the pressure head is formed in the side wall of the pressure head.

The middle part of the rupture disk is of an upward convex spherical shell structure, the middle part of the upper end face of the joint is provided with an upward convex spherical structure, the lower surface of the spherical shell structure is buckled on the upper surface of the spherical structure, the spherical structure is provided with a square groove along the radial direction of the joint, and the square groove is communicated with the first through hole.

Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, in particular, the upper end part and the lower end part of the outer circumference of the joint of the invention are both provided with external threads, the lower end part of the joint can be screwed on a pump head of an ultrahigh pressure plunger pump or a pipeline connected with the pump head through the external threads, a seal ring can play a sealing role, a protection cover is screwed on the top of the joint, a pressure head and a rupture disk are both positioned inside the protection cover, the pressure head is pressed on the top of the inner side of the protection cover, the rupture disk is pressed on the upper end surface of the joint by the pressure of the pressure head after the protection cover is screwed, the lower surface of the rupture disk is covered and pressed on the upper end surface of the joint and is tightly attached, thereby ensuring the sealing and avoiding the leakage, high-pressure liquid in the pump head or the pipeline acts on the rupture disk through a first through hole at the center, the liquid upwards enters the circular groove on the top of the inner side of the protective cover through the center hole of the pressure head and then is sprayed outwards from the second through holes to flow out, the protective cover covers the outer side of the top of the protective cover, and the second through holes are positioned inside the protective cover, so that the liquid sprayed out of the second through holes is blocked by the protective cover and can only be sprayed onto the inner side surface of the protective cover and flows downwards along the inner side surface of the protective cover, the liquid is prevented from being sprayed to the periphery, the spraying to people is prevented, the safety protection effect is achieved, the pressure release of a pump head or a pipeline is realized, the pressure of the pump head or the pipeline can be rapidly reduced; the burst pressure of the rupture disk is designed according to the overload pressure, the pressure is not required to be adjusted in advance, the borne pressure is large, the applicable overpressure range is wide, the structure is simple, and the installation is easy.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

Fig. 2 is an exploded view of a sectional structure of the present invention.

Fig. 3 is an exploded view of the overall structure of the present invention.

Fig. 4 is a top view of the joint of the present invention.

Detailed Description

The embodiments of the present invention are further described below with reference to the drawings.

As shown in fig. 1-4, an overload overpressure protection device for an ultra-high pressure plunger pump comprises a joint 1, a rupture disk 2, a pressure head 3, a protective cover 4, a protective cover 5 and a sealing ring 6, wherein the center line of the joint 1 is vertically arranged, the upper end part and the lower end part of the outer circumference of the joint 1 are both provided with external threads, the center of the joint 1 is provided with a first through hole 7 along the axis direction, the lower surface of the rupture disk 2 is covered and pressed on the upper end surface of the joint 1, the pressure head 3 is of a circular tube structure, the lower end of the pressure head 3 is tightly pressed on the outer edge of the upper surface of the rupture disk 2, the bottom of the protective cover 4 is open, the lower part of the inner ring of the protective cover 4 is provided with internal threads matched with the external threads, the inner ring of the protective cover 4 is in threaded connection with the top of the joint 1, the rupture disk 2 and the, an annular gap is formed between the inner circle side face of the protective cover 5 and the outer circumference face of the protective cover 4, the joint 1, the rupture disk 2, the pressure head 3, the center lines of the protective cover 4 and the protective cover 5 are overlapped, a circular groove 8 corresponding to the inner hole of the pressure head 3 is formed in the center of the top of the inner side of the protective cover 4 from top to bottom, the diameter of the circular groove 8 is equal to the inner diameter of the pressure head 3, a plurality of second through holes 9 communicated with the circular groove 8 are formed in the outer circumference of the upper side portion of the protective cover 4 along the circumferential direction, each second through hole 9 is located inside the protective cover 5, an annular groove 10 is formed in the middle of the lower.

The middle appearance of the joint 1 and the lower appearance of the protective cover 4 are both hexagonal prism structures (used for clamping a wrench), and the upper end edge of the hexagonal prism structure of the protective cover 4 is positioned right below the annular gap.

The outer edge of the top of the protective cover 4 is provided with a step 11, the middle of the top of the protective cover 5 is provided with a through round hole 12, the round hole 12 is sleeved on the periphery of the thin section of the top of the protective cover 4, the diameter of the round hole 12 is the same as the diameter of the outer circumference of the step 11 section of the top of the protective cover 4, and the surface of the top of the inner side of the protective cover 5 is in pressing contact with the surface of the step 11 of the.

An air buffer annular cavity 13 is arranged between the upper part of the inner circle of the protective cover 4 and the middle lower part of the outer circumference of the pressure head 3, and a third through hole 14 for communicating the air buffer annular cavity with the inner hole of the pressure head 3 is formed in the side wall of the pressure head 3. Air buffer memory annular chamber 13 is through third through-hole 14 and pressure head 3 hole intercommunication, and then through circular recess 8 and second through-hole 9 and external atmosphere intercommunication to avoid the air buffer memory annular chamber 13 between pressure head 3 and the visor 4 to form airtight cavity and lead to the unable discharge of inside air, prevent the unable condition of screwing up of visor 4.

The middle part of the rupture disk 2 is a spherical shell structure 15 which protrudes upwards, the middle part of the upper end surface of the joint 1 is provided with a spherical structure 16 which protrudes upwards, the lower surface of the spherical shell structure 15 is buckled and pressed on the upper surface of the spherical structure 16, so that the contact between the rupture disk 2 and the joint 1 is more stable, the spherical structure 16 is provided with a square groove 17 along the radial direction of the joint 1, and the square groove 17 is communicated with the first through hole 7, so that high-pressure liquid in a pump head or a pipeline is outwards acted on the rupture disk 2 through the first through hole 7 at the center of the joint 1, and due to the arrangement of the square groove 17, the acting area of the high-pressure liquid on the middle part of the rupture disk 2 can be increased, the pressure on the rupture disk 2 is increased, so that the rupture disk 2 can be more easily ruptured to achieve the.

The invention has the advantages that the upper end part and the lower end part of the outer circumference of a joint 1 are respectively provided with an external thread, the lower end part of the joint 1 can be screwed on a pump head of an ultrahigh pressure plunger pump or a pipeline connected with the pump head through the external threads, a sealing ring 6 can play a role in sealing, a protective cover 4 is screwed on the top of the joint 1, a pressure head 3 and a rupture disk 2 are both positioned inside the protective cover 4, the top of the inner side of the protective cover 4 presses the pressure head 3 tightly, the rupture disk 2 is pressed on the upper end surface of the joint 1 by the pressure of the pressure head 3 after the protective cover 4 is screwed, the lower surface of the rupture disk 2 covers and is pressed on the upper end surface of the joint 1 and is tightly attached, so that sealing is ensured and liquid leakage is avoided, high-pressure liquid in the pump head or the pipeline outwards acts on the rupture disk 2 through a first through hole 7 in the center of the joint 1, when the liquid pressure is higher than the set pressure of the, the liquid sprayed out of each second through hole 9 is blocked by the protective cover 5 and can only be sprayed onto the inner side surface of the protective cover 5 and flow downwards along the inner side surface of the protective cover 5, so that the liquid is prevented from being sprayed to the periphery, the spraying to people is prevented, the safety protection effect is achieved, the pressure release of a pump head or a pipeline is realized, the pressure of the pump head or the pipeline can be quickly reduced, and the purpose of protecting the pump head or the pipeline is achieved; the blasting pressure of the blasting sheet 2 is designed according to the overload pressure, the pressure is not required to be adjusted in advance, the borne pressure is large, the applicable overpressure range is wide, the structure is simple, and the installation is easy.

The above embodiments are merely to illustrate rather than to limit the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.