A valve body sealing structure for a high pressure plunger pump

Abstract

The present invention relates to the field of high-pressure plunger pumps, and in particular to a valve body sealing structure of a high-pressure plunger pump, comprising a feed valve group arranged on the high-pressure plunger pump and a discharge valve group arranged on the high-pressure plunger pump, wherein the feed valve group and the discharge valve group both comprise: a shell fixedly connected to the high-pressure plunger pump, a valve seat fixedly connected to the inside of the shell, a valve body slidably arranged inside the valve seat, a spring seat fixedly connected to the inside of the shell, a spring arranged between the spring seat and the valve body, and a sealing ring fixedly connected to the valve body; the beneficial effect of the present invention is that when the high-pressure plunger pump performs a pumping operation and the fluid flows through an elastic sealing sheet to enter the interior of the high-pressure plunger pump, the elastic sealing sheet will not cause a large impact on the elastic sealing sheet after the elastic sealing sheet protrudes from the surface of the valve body, thereby extending the service life of the elastic sealing sheet.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure plunger pumps, and in particular to a valve body sealing structure of a high-pressure plunger pump. Background Art

[0002] High-pressure plunger pump is a hydraulic device widely used in high-pressure, high-flow and flow-adjustable occasions. It realizes the functions of suction and discharge by changing the volume of the sealed working chamber through the reciprocating motion of the plunger in the cylinder. The operating pressure of the high-pressure plunger pump should generally be between 10MPa and 100MPa, and it is a type of positive displacement pump. This type of pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow adjustment. It has been widely used in hydraulic presses, engineering machinery, ships and other fields.

[0003] As a key component of high-pressure plunger pumps, the design of the sealing structure of the valve body is directly related to the sealing performance and service life of the pump. However, in practical applications, the existing valve body sealing structure generally has some problems, especially the problem of easy wear of the sealing ring, which seriously affects the sealing effect and performance of the high-pressure plunger pump.

[0004] At present, most of the valve-type sealing structures of high-pressure plunger pumps on the market use a single sealing ring for sealing. Although this sealing method has a simple structure and is easy to install and maintain, in the long-term use process, since the sealing ring is set protruding from the surface of the valve body, the sealing ring is subjected to the impact of the fluid for a long time when the fluid flows through the sealing ring, and it is very easy to wear;

[0005] At the same time, in the long-term use process, the extrusion between the sealing ring and the metal surface will aggravate the wear of the sealing ring. Since the hardness of the metal is much greater than the hardness of the sealing ring, when the sealing ring contacts and is squeezed by the metal surface, the surface material of the sealing ring is easily scratched and worn, resulting in a gradual decline in sealing performance.

[0006] Therefore, a high-pressure plunger pump valve sealing structure is needed to overcome the occurrence of the above-mentioned problems. Summary of the invention

[0007] In order to solve the above problems, an embodiment of the present invention provides a valve body sealing structure for a high-pressure plunger pump, which achieves the purpose of solving the problems raised in the background technology.

[0008] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a valve body sealing structure of a high-pressure plunger pump, comprising a feed valve group and a discharge valve group arranged on the high-pressure plunger pump, wherein the feed valve group and the discharge valve group both comprise: a housing fixedly connected to the high-pressure plunger pump, a valve seat fixedly connected to the inside of the housing, a valve body slidably arranged inside the valve seat, a spring seat fixedly connected to the inside of the housing, a spring arranged between the spring seat and the valve body, and a sealing ring fixedly connected to the valve body;

[0009] A groove 1 is provided on one side of the valve body close to the valve seat, a channel 1 connected to the groove 1 is provided inside the valve body, and an elastic sealing sheet 1 is fixedly connected inside the groove 1;

[0010] When the high-pressure plunger pump performs a pumping operation, the fluid inside the high-pressure plunger pump enters the interior of the groove one through the channel one, so that the elastic sealing sheet one is deformed and expanded and fits on the valve seat.

[0011] As a further improvement of the above technical solution:

[0012] A second groove is provided on one side of the valve seat, a second channel connected to the second groove is provided inside the valve seat, and a second elastic sealing sheet is fixedly connected inside the second groove.

[0013] The feed valve group is threadedly connected to the feed port of the high-pressure plunger pump, and the discharge valve group is threadedly connected to the discharge port of the high-pressure plunger pump;

[0014] Specifically, the outer portion of the shell is provided with an external thread, and the inner portions of the feed port and the discharge port are both provided with an internal thread.

[0015] A tightening block in a regular hexagonal shape is fixedly connected to the shell, and gaskets are fixedly connected to both sides of the tightening block.

[0016] The shell comprises: a cylinder body 1 threadedly connected to the feed inlet, and a cylinder body 2 threadedly connected to the discharge outlet;

[0017] Wherein, the thread direction of the external thread arranged on the outer surface of the first cylinder is opposite to the thread direction of the external thread arranged on the outer surface of the second cylinder.

[0018] The spring seat comprises: a seat body fixedly connected to the inside of the shell, and an adjusting column threadedly connected to the inside of the seat body.

[0019] A pulley is arranged on the side of the valve body.

[0020] The beneficial effects of the embodiments of the present invention are:

[0021] When the high-pressure plunger pump performs a pumping operation, the fluid inside the feed valve group squeezes the elastic sealing sheet 1, so that the elastic sealing sheet 1 enters the interior of the groove 1. Since the depth of the groove 1 is the same as the thickness of the elastic sealing sheet 1, the elastic sealing sheet 1 is filled in the interior of the groove 1, which makes it difficult for the elastic sealing sheet 1 to deform, and the surfaces of the elastic sealing sheet 1 and the valve body are in a flat state, that is, the elastic sealing sheet 1 does not protrude from the surface of the valve body; when the high-pressure plunger pump performs a pumping operation, when the fluid flows through the elastic sealing sheet 1 and enters the interior of the high-pressure plunger pump, the elastic sealing sheet 1 will not cause a large impact on the elastic sealing sheet 1 because the elastic sealing sheet 1 protrudes from the surface of the valve body, thereby extending the service life of the elastic sealing sheet 1;

[0022] The connection between the valve body and the valve seat on the feed valve group is sealed in multiple steps by means of a sealing ring and an elastic sealing sheet, thereby improving the sealing effect of the connection between the valve body and the valve seat on the feed valve group;

[0023] When the connection between the valve body and the valve seat on the feed valve group is sealed by the elastic sealing piece 2 and the elastic sealing piece 1, the elastic sealing piece 2 and the elastic sealing piece 1 contact each other, avoiding the problem of easy scratches and wear caused by contact with metal surfaces, thereby extending the service life of the elastic sealing piece 2 and the elastic sealing piece 1. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0025] Figure 2 It is a cross-sectional schematic diagram of the feed valve assembly of the present invention;

[0026] Figure 3 for Figure 2 A schematic diagram of the structure enlargement at the center A;

[0027] Figure 4 It is a schematic diagram of the structure of the elastic sealing sheet 1 and the elastic sealing sheet 2 after being bulged in the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the housing of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the adjusting column of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the valve body of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the valve seat of the present invention.

[0032] In the figure: 1. High-pressure plunger pump; 2. Feed valve group; 3. Discharge valve group; 5. Feed port; 6. Discharge port; 7. Pulley;

[0033] 41. Valve seat; 42. Shell; 43. Valve body; 44. Spring seat; 45. Spring; 46. Sealing ring; 47. Groove 1; 48. Channel 1; 49. Groove 2; 410. Channel 2; 411. Elastic sealing sheet 2; 412. Elastic sealing sheet 1;

[0034] 421, tightening block; 422, gasket; 423, cylinder body 1; 424, cylinder body 2;

[0035] 441. seat body; 442. adjustment column. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] See also Figures 1 to 8 The embodiment of the present invention discloses a valve body sealing structure of a high-pressure plunger pump, comprising a feed valve group 2 arranged on the high-pressure plunger pump 1 and a discharge valve group 3 arranged on the high-pressure plunger pump 1, wherein the feed valve group 2 and the discharge valve group 3 both comprise: a housing 42 fixedly connected to the high-pressure plunger pump 1, a valve seat 41 fixedly connected to the inside of the housing 42, a valve body 43 slidably arranged inside the valve seat 41, a spring seat 44 fixedly connected to the inside of the housing 42, a spring 45 arranged between the spring seat 44 and the valve body 43, and a sealing ring 46 fixedly connected to the valve body 43;

[0038] In actual use, when the high-pressure plunger pump 1 performs a pumping operation, the fluid enters the interior of the high-pressure plunger pump 1 through the feed valve group 2. When the high-pressure plunger pump 1 performs a pumping operation, the fluid inside the high-pressure plunger pump 1 is discharged through the discharge valve group 3; specifically:

[0039] When the high-pressure plunger pump 1 performs the pumping operation, the piston inside the high-pressure plunger pump 1 moves, so that the interior of the high-pressure plunger pump 1 is in a low-pressure environment. At this time, the valve body 43 on the discharge valve group 3 is pressed against the valve seat 41 under the elastic force of the spring 45 and the internal fluid pressure of the discharge valve group 3, and the connection between the valve body 43 and the valve seat 41 is sealed by the sealing ring 46. Since the interior of the high-pressure plunger pump 1 is at low pressure, the fluid pressure inside the feed valve group 2 is greater than the internal fluid pressure of the high-pressure plunger pump 1 plus the elastic force of the spring 45 inside the feed valve group 2, so that the fluid inside the feed valve group 2 pushes the valve body 43 on the feed valve group 2 to move, so that the valve seat 41 and the valve body 43 are separated, so that the fluid inside the feed valve group 2 enters the interior of the high-pressure plunger pump 1, and the pumping operation is completed;

[0040] When the high-pressure plunger pump 1 performs the pumping operation, the piston inside the high-pressure plunger pump 1 moves in the opposite direction, so that the piston squeezes the fluid inside the high-pressure plunger pump 1, and the interior of the high-pressure plunger pump 1 is in a high-pressure environment. At this time, the valve body 43 on the feed valve group 2 is pressed against the valve seat 41 under the elastic force of the spring 45 and the internal fluid pressure of the high-pressure plunger pump 1, and the connection between the valve body 43 and the valve seat 41 is sealed by the sealing ring 46. When the fluid pressure inside the high-pressure plunger pump 1 is greater than the internal fluid pressure of the discharge valve group 3 plus the elastic force of the spring 45 inside the discharge valve group 3, the fluid inside the high-pressure plunger pump 1 pushes the valve body 43 on the discharge valve group 3 to move, so that the valve seat 41 and the valve body 43 are separated, and the fluid inside the high-pressure plunger pump 1 is discharged through the discharge valve group 3, and the pumping operation is completed.

[0041] A groove 47 is formed on one side of the valve body 43 close to the valve seat 41, a channel 48 connected to the groove 47 is formed inside the valve body 43, and an elastic sealing sheet 412 is fixedly connected inside the groove 47;

[0042] When the high-pressure plunger pump 1 performs the pumping operation, the valve body 43 on the feed valve group 2 is pressed against the valve seat 41 under the elastic force of the spring 45 and the fluid pressure inside the high-pressure plunger pump 1, and the connection between the valve body 43 and the valve seat 41 is sealed by the sealing ring 46. At the same time, the high-pressure fluid inside the high-pressure plunger pump 1 enters the interior of the groove 47 through the channel 148. Since the fluid pressure inside the high-pressure plunger pump 1 is greater than the fluid pressure inside the feed valve group 2, the elastic sealing sheet 1412 can be lifted up, that is, the elastic sealing sheet 1412 is deformed and expanded to fit on the valve seat 41, that is, the connection between the valve body 43 on the feed valve group 2 and the valve seat 41 is sealed by the elastic sealing sheet 1412.

[0043] When the high-pressure plunger pump 1 performs the pumping operation, the fluid pressure inside the feed valve group 2 is greater than the fluid pressure inside the high-pressure plunger pump 1. After adding the elastic force of the spring 45 inside the feed valve group 2, the fluid inside the feed valve group 2 pushes the valve body 43 on the feed valve group 2 to move, so that the valve seat 41 and the valve body 43 are separated. At this time, the fluid pressure inside the feed valve group 2 is greater than the fluid pressure inside the high-pressure plunger pump 1. At this time, the fluid inside the feed valve group 2 squeezes the elastic sealing sheet 1 412, so that the elastic sealing sheet 1 412 enters the interior of the groove 1 47;

[0044] When the high-pressure plunger pump 1 performs pumping operation, the fluid inside the high-pressure plunger pump 1 enters the interior of the groove 47 through the channel 48, so that the elastic sealing sheet 412 is deformed and expanded to fit on the valve seat 41;

[0045] When the high-pressure plunger pump 1 performs the pumping operation, the valve body 43 on the feed valve group 2 is pressed against the valve seat 41 under the elastic force of the spring 45 and the internal fluid pressure of the high-pressure plunger pump 1, and the connection between the valve body 43 and the valve seat 41 is sealed by the sealing ring 46. At this time, there is a gap at the adjacent positions of the valve body 43 and the valve seat 41, and the elastic sealing sheet 412 is located at the gap position, so that the elastic sealing sheet 412 can be normally lifted up after the high-pressure fluid is introduced into the groove 47.

[0046] As a further illustration of this application:

[0047] The depth of the groove 47 is the same as the thickness of the elastic sealing sheet 412. When the high-pressure plunger pump 1 performs a pumping operation, since the elastic sealing sheet 412 has a certain elasticity and the two sides of the elastic sealing sheet 412 are fixed inside the groove 47, the inside of the groove 47 is filled with high-pressure fluid and then the elastic sealing sheet 412 is bulged, so that the bulged elastic sealing sheet 412 fits on the valve seat 41 to achieve sealing; when the high-pressure plunger pump 1 performs a pumping operation, the fluid inside the feed valve group 2 squeezes the elastic sealing sheet 412, so that the elastic sealing sheet 412 enters the inside of the groove 47. Since the depth of the groove 47 is the same as the thickness of the elastic sealing sheet 412, the elastic sealing sheet 412 enters the inside of the groove 47. The thickness of the elastic sealing sheet 412 is the same, so that the elastic sealing sheet 412 fills the inside of the groove 47, that is, the elastic sealing sheet 412 is difficult to deform, and the surface of the elastic sealing sheet 412 and the valve body 43 are flat, that is, the elastic sealing sheet 412 does not protrude from the surface of the valve body 43; when the high-pressure plunger pump 1 performs a pumping operation, when the fluid flows through the elastic sealing sheet 412 and enters the inside of the high-pressure plunger pump 1, the elastic sealing sheet 412 will not protrude from the surface of the valve body 43, causing the fluid to cause a large impact on the elastic sealing sheet 412, thereby extending the service life of the elastic sealing sheet 412;

[0048] At the same time, the connection between the valve body 43 and the valve seat 41 on the feed valve group 2 is sealed in multiple ways through the sealing ring 46 and the elastic sealing sheet 412, thereby improving the sealing effect of the connection between the valve body 43 and the valve seat 41 on the feed valve group 2.

[0049] As a further illustration of this application:

[0050] The diameter of the channel 48 is smaller than the width of the groove 47; it should be noted that the diameter of the channel 48 determines the response speed of the elastic sealing sheet 412 swelling, because the larger the diameter of the channel 48, the faster the fluid inside the high-pressure plunger pump 1 can enter the inside of the groove 47; the smaller the diameter of the channel 48, the slower the fluid inside the high-pressure plunger pump 1 enters the inside of the groove 47;

[0051] When the high-pressure plunger pump 1 performs a pumping operation, the fluid inside the feed valve group 2 squeezes the elastic sealing sheet 412, and the elastic sealing sheet 412 enters the interior of the groove 47;

[0052] At this time, if the diameter of the channel 1 48 is too large, the elastic sealing sheet 1 412 located at the channel 1 48 will be pressed into the interior of the channel 1 48 under the action of the fluid pressure, so that the outer surface of the elastic sealing sheet 1 412 is uneven, which may cause the fluid to cause a greater impact on the elastic sealing sheet 1 412, thereby aggravating the wear of the elastic sealing sheet 1 412.

[0053] At this time, if the diameter of the channel 148 is small, the elastic sealing sheet 1412 located at the channel 148 is difficult to be pressed into the channel 148 and deformed under the action of the fluid pressure, that is, the elastic sealing sheet 1412 is kept flat; this is because, the larger the diameter of the channel 148, the larger the area covered by the elastic sealing sheet 1412 on the channel 148, and when the fluid pressure remains unchanged, the greater the force borne by the elastic sealing sheet 1412 at the position of the channel 148, so the elastic sealing sheet 1412 is easy to deform;

[0054] Therefore, in actual use, the diameter of channel 48 should be adjusted according to the actual situation. Under the premise of ensuring the response speed, the diameter of channel 48 should be reduced as much as possible to prevent the elastic sealing sheet 412 from being deformed at channel 48 during the pumping operation.

[0055] As a further illustration of this application:

[0056] A second groove 49 is formed on one side of the valve seat 41, a second channel 410 connected to the second groove 49 is formed inside the valve seat 41, and a second elastic sealing sheet 411 is fixedly connected inside the second groove 49; both sides of the second elastic sealing sheet 411 are fixedly connected inside the second groove 49;

[0057] When the high-pressure plunger pump 1 performs the pumping operation, the valve body 43 on the feed valve group 2 is pressed against the valve seat 41 under the elastic force of the spring 45 and the internal fluid pressure of the high-pressure plunger pump 1, and the connection between the valve body 43 and the valve seat 41 is sealed by the sealing ring 46. At the same time, the high-pressure fluid inside the high-pressure plunger pump 1 enters the interior of the groove 47 through the channel 48. Since the fluid pressure inside the high-pressure plunger pump 1 is greater than the fluid pressure inside the feed valve group 2, the elastic sealing sheet 412 can be lifted up, that is, the elastic seal sheet 412 is The elastic sealing piece 1 412 is deformed and expanded to fit on the elastic sealing piece 2 411, that is, the connection between the valve body 43 and the valve seat 41 on the feed valve group 2 is sealed by the elastic sealing piece 1 412. At the same time, the high-pressure fluid inside the high-pressure plunger pump 1 enters the inside of the groove 2 49 through the channel 2 410. Since the fluid pressure inside the high-pressure plunger pump 1 is greater than the fluid pressure inside the feed valve group 2, the elastic sealing piece 2 411 can be lifted up, that is, the elastic sealing piece 2 411 is deformed and expanded to fit on the elastic sealing piece 1 412;

[0058] That is, when the pumping operation is performed, the connection between the valve body 43 and the valve seat 41 on the feed valve group 2 is sealed by the elastic sealing piece 2 411 and the elastic sealing piece 1 412, and the elastic sealing piece 2 411 and the elastic sealing piece 1 412 are tightly fitted together by the fluid pressure inside the elastic sealing piece 2 411 and the fluid pressure inside the elastic sealing piece 1 412, thereby improving the sealing effect; and when the pumping operation is performed, the greater the pressure inside the high-pressure plunger pump 1, the tighter the elastic sealing piece 2 411 and the elastic sealing piece 1 412 fit together, that is, the better the sealing effect;

[0059] When the connection between the valve body 43 and the valve seat 41 on the feed valve group 2 is sealed by the elastic sealing piece 2 411 and the elastic sealing piece 1 412, the elastic sealing piece 2 411 and the elastic sealing piece 1 412 contact each other, avoiding the problem of easy scratches and wear caused by contact with metal surfaces, thereby extending the service life of the elastic sealing piece 2 411 and the elastic sealing piece 1 412.

[0060] As a further illustration of this application:

[0061] The elastic sealing sheet 2 411 and the elastic sealing sheet 1 412 can be made of materials such as rubber, polyurethane, and polyvinyl chloride.

[0062] As a further illustration of this application:

[0063] The depth of the groove 49 is the same as the thickness of the elastic sealing sheet 411. When the high-pressure plunger pump 1 performs a pumping operation, the elastic sealing sheet 411 has a certain elasticity, so that the interior of the groove 49 is filled with high-pressure fluid and then the elastic sealing sheet 411 is bulged, so that the bulged elastic sealing sheet 411 and the bulged elastic sealing sheet 1 412 fit together to achieve sealing; when the high-pressure plunger pump 1 performs a pumping operation, the fluid inside the feed valve group 2 squeezes the elastic sealing sheet 411, so that the elastic sealing sheet 411 enters the interior of the groove 49. Since the depth of the groove 49 is the same as the thickness of the elastic sealing sheet 411, the elastic sealing sheet 411 is bulged. The thickness is the same, so that the elastic sealing piece 2 411 is filled in the interior of the groove 2 49, that is, the elastic sealing piece 2 411 is difficult to deform, and the surfaces of the elastic sealing piece 2 411 and the valve seat 41 are flat, that is, the elastic sealing piece 2 411 does not protrude from the surface of the valve seat 41; when the high-pressure plunger pump 1 is pumping, when the fluid flows through the elastic sealing piece 2 411 and enters the interior of the high-pressure plunger pump 1, the elastic sealing piece 2 411 will not protrude from the surface of the valve seat 41, causing a large impact on the elastic sealing piece 2 411, thereby extending the service life of the elastic sealing piece 2 411.

[0064] As a further illustration of this application:

[0065] In actual use, the diameter of the second channel 410 should be adjusted according to the actual situation. Under the premise of ensuring the response speed, the diameter of the second channel 410 should be reduced as much as possible to prevent the elastic sealing piece 411 from deforming at the second channel 410 during the pumping operation.

[0066] As a further illustration of this application:

[0067] There are multiple channels 1 48, and multiple channels 1 48 are arranged in a circular array on the valve body 43; the number of channels 2 410 is equal to the number of channels 1 48, and multiple channels 2 410 are arranged in a circular array on the valve seat 41; multiple channels 1 48 and multiple channels 2 410 are arranged in an alternating manner;

[0068] During the pumping operation, the elastic sealing sheet 1 412 bulges. Since the high-pressure fluid enters the groove 1 47 from the connection between the channel 1 48 and the groove 1 47, the high-pressure fluid will impact the elastic sealing sheet 1 412 after entering the interior of the groove 1 47, causing the bulging amplitude of this part to be larger. The same is true for the elastic sealing sheet 2 411, that is, during the pumping operation, the part of the elastic sealing sheet 2 411 located at the connection between the channel 2 410 and the groove 2 49 bulges to a larger extent.

[0069] In actual use, by staggeredly arranging multiple channels 1 48 and multiple channels 2 410, the larger bulging portion of the elastic sealing sheet 1 412 and the larger bulging portion of the elastic sealing sheet 2 411 are staggered, thereby improving the fit between the elastic sealing sheet 1 412 and the elastic sealing sheet 2 411, and then improving the sealing between the elastic sealing sheet 1 412 and the elastic sealing sheet 2 411.

[0070] As a further illustration of this application:

[0071] The feed valve group 2 is threadedly connected to the feed port 5 of the high-pressure plunger pump 1, and the discharge valve group 3 is threadedly connected to the discharge port 6 of the high-pressure plunger pump 1;

[0072] Specifically, the outer surface of the housing 42 is provided with an external thread, and the inner surfaces of the feed port 5 and the discharge port 6 are both provided with an internal thread;

[0073] In actual use, the feed valve group 2 and the discharge valve group 3 threadedly connected to the high-pressure plunger pump 1 are easy to disassemble and repair.

[0074] As a further illustration of this application:

[0075] A tightening block 421 in the shape of a regular hexagon is fixedly connected to the outer shell 42, and gaskets 422 are fixedly connected to both sides of the tightening block 421. In actual use, the tightening block 421 is pressed against the feed port 5 or the discharge port 6, and the connection is sealed by the gasket 422 to ensure the sealing effect between the outer shell 42 and the high-pressure plunger pump 1.

[0076] As a further illustration of this application:

[0077] The housing 42 includes: a cylinder 1 423 threadedly connected to the feed port 5, and a cylinder 2 424 threadedly connected to the discharge port 6;

[0078] The thread direction of the external thread provided on the outer surface of the cylinder 1 423 is opposite to the thread direction of the external thread provided on the outer surface of the cylinder 2 424;

[0079] In actual use, since the installation direction of the valve seat 41 and the valve body 43 inside the feed valve group 2 is the same as the installation direction of the valve seat 41 and the valve body 43 inside the discharge valve group 3, when the housing 42 is installed on the high-pressure plunger pump 1, the orientation of the housing 42 is fixed and cannot be changed;

[0080] By setting the thread directions of the barrel 1 423 and the barrel 2 424 in opposite directions, it is possible to prevent the barrel 1 423 from being mistakenly installed inside the discharge port 6 , and it is also possible to prevent the barrel 2 424 from being mistakenly installed inside the feed port 5 .

[0081] As a further illustration of this application:

[0082] The spring seat 44 includes: a seat body 441 fixedly connected to the inside of the housing 42, and an adjustment column 442 threadedly connected to the inside of the seat body 441;

[0083] The elastic force of the spring 45 will affect the flow characteristics of the feed valve group 2 and the discharge valve group 3. If the elastic force of the spring 45 is too large, the starting force required for the valve body 43 to move will be greater, resulting in an increase in the pressure required for the valve body 43 to separate from the valve seat 41, which may limit the amount of fluid passing through. On the contrary, if the elastic force of the spring 45 is too small, the valve body 43 is easier to move, but the valve body 43 may frequently separate from the valve seat 41 and close when the fluid pressure fluctuates, affecting stability.

[0084] By rotating the adjusting column 442 to adjust the distance between the valve body 43 and the adjusting column 442, the compression degree of the spring 45 is changed, so that the starting force required for the valve body 43 to move is changed, and the opening force of the feed valve group 2 and the discharge valve group 3 can be adjusted;

[0085] In actual use, the opening forces of the feed valve group 2 and the discharge valve group 3 are different; specifically, when the high-pressure plunger pump 1 performs a pumping operation, the feed valve group 2 is opened and the discharge valve group 3 is closed. When the fluid pressure inside the feed valve group 2 is greater than the fluid pressure inside the high-pressure plunger pump 1 plus the elastic force of the spring 45 inside the feed valve group 2, the fluid inside the feed valve group 2 pushes the valve body 43 on the feed valve group 2 to move, so that the valve seat 41 and the valve body 43 are separated, so that the fluid inside the feed valve group 2 can enter the interior of the high-pressure plunger pump 1; when the high-pressure plunger pump 1 performs a pumping operation, the feed valve group 2 is closed and the discharge valve group 3 is opened. When the fluid pressure inside the high-pressure plunger pump 1 is greater than the fluid pressure inside the discharge valve group 3 plus the elastic force of the spring 45 inside the discharge valve group 3, the high-pressure The fluid inside the plunger pump 1 pushes the valve body 43 on the discharge valve group 3 to move, so that the valve seat 41 and the valve body 43 are separated, and the fluid inside the high-pressure plunger pump 1 is discharged through the discharge valve group 3, and the pumping operation is completed; that is, the opening force of the feed valve group 2 is the internal fluid pressure of the high-pressure plunger pump 1 plus the elastic force of the spring 45 inside the feed valve group 2, and the opening force of the discharge valve group 3 is the internal fluid pressure of the discharge valve group 3 plus the elastic force of the spring 45 inside the discharge valve group 3. Therefore, the opening forces of the feed valve group 2 and the discharge valve group 3 are different, and the initial elastic force requirements for the elastic force of their respective internal springs 45 are different. Therefore, the spring seat 44 with adjustable initial elastic force of the spring 45 is used to adjust the spring 45 inside the feed valve group 2 and the discharge valve group 3 for practical use.

[0086] As a further illustration of this application:

[0087] The feed valve group 2 and the discharge valve group 3 adopt the same structure, which is convenient for actual production use, and the elastic force of the spring 45 can be adjusted by the spring seat 44 to meet the different requirements of the feed valve group 2 and the discharge valve group 3 for the elastic force of the spring 45.

[0088] As a further illustration of this application:

[0089] The side of the valve body 43 is provided with a pulley 7 which is attached to the inner wall of the valve seat 41. The valve body 43 moves on the valve seat 41 through the pulley 7, so that the movement of the valve body 43 on the valve seat 41 is smoother, which is convenient for pumping in and out.

[0090] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0091] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0093] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A valve body sealing structure for a high-pressure plunger pump, comprising a feed valve group (2) arranged on the high-pressure plunger pump (1) and a discharge valve group (3) arranged on the high-pressure plunger pump (1), characterized in that: The feed valve group (2) and the discharge valve group (3) each comprise: a housing (42) fixedly connected to the high-pressure plunger pump (1), a valve seat (41) fixedly connected to the inside of the housing (42), a valve body (43) slidably arranged inside the valve seat (41), a spring seat (44) fixedly connected to the inside of the housing (42), a spring (45) arranged between the spring seat (44) and the valve body (43), and a sealing ring (46) fixedly connected to the valve body (43); A groove 1 (47) is formed on one side of the valve body (43) close to the valve seat (41); a channel 1 (48) communicating with the groove 1 (47) is formed inside the valve body (43); an elastic sealing sheet 1 (412) is fixedly connected inside the groove 1 (47); wherein the depth of the groove 1 (47) is the same as the thickness of the elastic sealing sheet 1 (412); when the high-pressure plunger pump (1) performs a pumping operation, the surfaces of the elastic sealing sheet 1 (412) and the valve body (43) are in a flat state; A second groove (49) is provided on one side of the valve seat (41), a second channel (410) connected to the second groove (49) is provided inside the valve seat (41), and an elastic sealing sheet (411) is fixedly connected inside the second groove (49); when the high-pressure plunger pump (1) performs a pumping operation, the high-pressure fluid inside the high-pressure plunger pump (1) enters the interior of the first groove (47) through the first channel (48), so that the elastic sealing sheet (412) is lifted up, and at the same time, the high-pressure fluid inside the high-pressure plunger pump (1) enters the interior of the second groove (49) through the second channel (410), so that the elastic sealing sheet (411) is lifted up, that is, the elastic sealing sheet (411) and the elastic sealing sheet (412) are in contact with each other; The number of the first channel (48) is multiple, and the multiple first channels (48) are arranged in a circular array on the valve body (43); the number of the second channels (410) is equal to the number of the first channels (48), and the multiple second channels (410) are arranged in a circular array on the valve seat (41); the multiple first channels (48) and the multiple second channels (410) are arranged in an alternating manner; so that the part of the elastic sealing sheet (412) with a larger bulging amplitude is staggered with the part of the elastic sealing sheet (411) with a larger bulging amplitude.

2. The valve body sealing structure of a high-pressure plunger pump according to claim 1, characterized in that: The feed valve assembly (2) is threadedly connected to the feed port (5) of the high-pressure plunger pump (1), and the discharge valve assembly (3) is threadedly connected to the discharge port (6) of the high-pressure plunger pump (1); Specifically, the outer portion of the housing (42) is provided with an external thread, and the inner portions of the feed port (5) and the discharge port (6) are both provided with an internal thread.

3. The valve body sealing structure of the high-pressure plunger pump according to claim 2 is characterized in that: A tightening block (421) in the form of a regular hexagon is fixedly connected to the outer shell (42), and gaskets (422) are fixedly connected to both sides of the tightening block (421).

4. The valve body sealing structure of the high-pressure plunger pump according to claim 3 is characterized in that: The housing (42) comprises: a first cylinder (423) threadedly connected to the feed port (5), and a second cylinder (424) threadedly connected to the discharge port (6); The thread direction of the external thread arranged on the outer surface of the cylinder body 1 (423) is opposite to the thread direction of the external thread arranged on the outer surface of the cylinder body 2 (424).

5. The valve body sealing structure of the high-pressure plunger pump according to claim 1, characterized in that: The spring seat (44) comprises: a seat body (441) fixedly connected to the interior of the housing (42), and an adjustment column (442) threadedly connected to the interior of the seat body (441).

6. The valve body sealing structure of the high-pressure plunger pump according to claim 5, characterized in that: A pulley (7) is provided on the side of the valve body (43) and is attached to the inner wall of the valve seat (41).

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