Hydraulic end valve group electromagnetic opening and closing structure for reciprocating pump

Abstract

The utility model relates to the technical field of reciprocating pump liquid path control, and provides a hydraulic end valve group electromagnetic opening and closing structure for a reciprocating pump, which comprises a valve body, a valve core, a valve rod and a sealing element, the valve body is provided with an input flow channel, an output flow channel and a mounting cavity, the valve core is arranged in the mounting cavity in a sliding manner to selectively block the input flow channel and the output flow channel, and the valve rod is arranged in the mounting cavity. The valve core is in sliding seal with the mounting cavity; the valve rod is arranged on one side of the valve element and used for being connected with the electromagnetic driving assembly. The sealing piece is arranged on the valve rod and provided with a sealing block, and the sealing block abuts against the outer wall of the valve rod and the inner wall of the installation cavity. According to the electromagnetic opening and closing structure, the valve rod is provided with the sealing piece, the sealing piece is provided with the sealing block, the valve element and the mounting cavity are in sliding sealing, the sealing block abuts against the valve rod and the inner wall of the mounting cavity, double sealing is achieved, and even if the valve element is damaged, a conveying medium cannot overflow through the mounting cavity; therefore, the electromagnetic driving assembly can be effectively protected, and liquid leakage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating pump fluid circuit control, in particular to an electromagnetic opening and closing structure of a hydraulic end valve group for a reciprocating pump. Background Art

[0002] The on-off control of the solenoid valve in the reciprocating pump liquid circuit mainly regulates the liquid flow direction, pressure and flow by controlling the on-off state of the solenoid valve. The on-off control structure of the solenoid valve is not only used for the circulation control of the medium transported by the reciprocating pump, but is also commonly used in the control of various functional oil circuits.

[0003] The existing utility model patent with authorization announcement number CN215370200U discloses a pressure detection and adjustment structure for the plunger sealing chamber of a reciprocating pump. The reciprocating pump includes a pump body, a casing, a plunger, a plunger sealing chamber and an oil storage tank. The oil storage tank is connected to the plunger sealing chamber via an oil inlet pipeline. The plunger sealing chamber is connected to an oil outlet main pipeline arranged outside the pump body via an oil outlet pipeline inside the pump body. An electromagnetic valve is provided on the oil outlet main pipeline; the oil storage tank is connected to a first pressure detection transmitter, and the oil outlet main pipeline is connected to a second pressure detection transmitter.

[0004] As in the above technical solution, a solenoid valve is provided on the oil outlet main pipeline for pressure control. Since in the current solenoid valve structure, usually only the valve core and the valve body are sealed, when the valve core is damaged, not only the input flow channel and the output flow channel will be connected, but the high-pressure medium will also overflow to the electromagnetic drive component on the side away from the valve core, which can easily cause damage to the electromagnetic drive component.

[0005] Most existing solenoid valves adopt an assembled structure. Due to the sealing effect of the valve core, the electromagnetic drive component end is usually not completely sealed. Therefore, when the valve core is damaged, medium leakage is likely to occur through the electromagnetic drive component end. Utility Model Content

[0006] In view of this, the utility model proposes an electromagnetic opening and closing structure of a hydraulic end valve group for a reciprocating pump with good sealing effect and not prone to medium leakage, so as to solve the problem that when the valve core of the existing solenoid valve is damaged, the electromagnetic drive component is easily damaged and the medium leaks.

[0007] The technical solution of the present utility model is achieved as follows:

[0008] The utility model provides an electromagnetic opening and closing structure of a hydraulic end valve group for a reciprocating pump, comprising a valve body, a valve core, a valve stem and a sealing member, wherein:

[0009] The valve body is provided with an input flow channel, an output flow channel and an installation cavity, and the input flow channel, the output flow channel and the installation cavity are connected;

[0010] The valve core is slidably arranged in the installation cavity to selectively block the input flow channel and the output flow channel, and the valve core and the installation cavity are slidably sealed;

[0011] The valve stem is arranged on one side of the valve core and is used to connect to the electromagnetic drive assembly;

[0012] The sealing member is arranged on the valve stem and is provided with a sealing block. The sealing block abuts against the outer wall of the valve stem and the inner wall of the installation cavity.

[0013] On the basis of the above technical solution, preferably, the sealing member further includes a fixing seat and an elastic member, wherein:

[0014] The fixed seat sleeve is arranged on the valve stem, and the fixed seat and the valve stem are relatively fixed;

[0015] The sealing block is sleeved on the valve stem, and the sealing block is located between the fixed seat and the valve core, and the sealing block and the valve stem are slidably matched;

[0016] The elastic member is arranged between the fixing seat and the sealing block, and the elastic member is connected to the fixing seat and the sealing block.

[0017] Based on the above technical solution, preferably, the elastic member is an elastic washer or a spring.

[0018] On the basis of the above technical solution, preferably, the sealing member further includes a sleeve and a sliding rod, wherein:

[0019] The sleeve is fixedly arranged in the fixing seat;

[0020] One end of the sliding rod is slidably matched with the sleeve, and the other end is connected with the sealing block.

[0021] On the basis of the above technical solution, preferably, the sealing block includes an outer layer and a support member, wherein,

[0022] The outer layer is made of rubber, the support is made of metal, and the outer layer covers the support;

[0023] The outer cladding abuts against the outer wall of the valve stem and the inner wall of the mounting cavity;

[0024] The support member is connected to the slide bar.

[0025] On the basis of the above technical solution, preferably, it further comprises a first sealing ring, the outer covering layer and the support member are both annular structures, and the inner ring of the support member is exposed outside the outer covering layer;

[0026] The first sealing ring is arranged at the inner ring of the support member and fits the valve stem.

[0027] On the basis of the above technical solution, preferably, it further includes a second sealing ring, which is arranged on the circumferential surface of the valve core and abuts against the inner wall of the installation cavity.

[0028] On the basis of the above technical solution, preferably, a third sealing ring is further included, which is arranged on the circumferential surface of the fixing seat and abuts against the inner wall of the installation cavity.

[0029] On the basis of the above technical solution, preferably, the valve core has a first conical surface, and the sealing block has a second conical surface;

[0030] The first conical surface and the second conical surface are both in contact with the inner wall of the installation cavity;

[0031] The taper of the second tapered surface is greater than the taper of the first tapered surface.

[0032] On the basis of the above technical solution, preferably, a fourth sealing ring is further included, which is arranged on the inner wall of the installation cavity and abuts against the second conical surface.

[0033] The electromagnetic opening and closing structure of the hydraulic end valve group for reciprocating pumps of the utility model has the following advantages compared with the prior art:

[0034] Beneficial effects:

[0035] (1) By providing a seal on the valve stem, and the seal having a sealing block, the electromagnetic opening and closing structure is sealed by sliding between the valve core and the installation cavity, and the sealing block is used to abut against the valve stem and the inner wall of the installation cavity, thereby achieving double sealing. Even if the valve core is damaged, the conveying medium will only enter the output flow channel through the input flow channel and will not overflow through the installation cavity. This can effectively protect the electromagnetic drive component and avoid leakage.

[0036] (2) In the sealing structure, the sealing block is installed through the mounting seat, and an elastic member is provided between the mounting seat and the sealing block. In this way, when the valve stem moves, the sealing member as a whole follows the movement. When the valve stem moves in the closing direction, the elastic member can tightly hold the sealing block against the inner wall of the mounting cavity, thereby ensuring the sealing effect;

[0037] (3) The taper of the first conical surface is relatively small, so that it can stably press against the inner wall of the valve body and achieve a good sealing effect. By controlling the taper of the second conical surface to be larger than that of the first conical surface, the distance between the second conical surface and the valve core can be increased, leaving space for the sliding of the sealing block, which is conducive to ensuring the compactness of the electromagnetic opening and closing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a cross-sectional view of the electromagnetic opening and closing structure of the hydraulic end valve group for the reciprocating pump of the present invention;

[0040] Figure 2 This is a cross-sectional view of the valve core, valve stem and sealing components of the electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump of the present invention;

[0041] Figure 3 This is a disassembled structural diagram of the valve body of the electromagnetic opening and closing structure of the hydraulic end valve group for the reciprocating pump of the utility model;

[0042] In the figure: 1. valve body; 101. input flow channel; 102. output flow channel; 103. mounting cavity; 2. valve core; 201. first conical surface; 3. valve stem; 4. sealing member; 41. sealing block; 411. outer layer; 412. support member; 42. fixing seat; 43. elastic member; 44. sleeve; 45. sliding rod; 401. second conical surface; 5. first sealing ring; 6. second sealing ring; 7. third sealing ring; 8. fourth sealing ring. DETAILED DESCRIPTION

[0043] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] like Figures 1 to 3 As shown, the electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump of the present invention includes a valve body 1, a valve core 2, a valve stem 3 and a sealing member 4, a first sealing ring 5, a second sealing ring 6, a third sealing ring 7 and a fourth sealing ring 8.

[0045] like Figure 1 and Figure 2 As shown, the valve body 1 is provided with an input flow channel 101, an output flow channel 102 and an installation cavity 103, and the input flow channel 101, the output flow channel 102 and the installation cavity 103 are connected; the valve core 2 is slidably arranged in the installation cavity 103 to selectively block the input flow channel 101 and the output flow channel 102, and the valve core 2 and the installation cavity 103 are slidingly sealed; the valve stem 3 is arranged on one side of the valve core 2 for connecting to the electromagnetic drive assembly;

[0046] As shown in the above structure, the input flow channel 101 is used to connect to the medium supply pipeline, and the output flow channel 102 is connected to the medium output flow channel. The valve core 2 and the valve stem 3 are arranged in the installation cavity 103. After the valve stem 3 is connected to the electromagnetic drive assembly, it can drive the valve core 2 to operate to cut off the input flow channel 101 and the output flow channel 102, or connect the two flow channels;

[0047] In this structure, the valve core 2 abuts against the inner wall of the installation cavity 103 to prevent the medium from flowing toward the electromagnetic drive assembly;

[0048] Specifically, the electromagnetic drive assembly is a conventional drive structure composed of components such as a magnet, a static iron core and a movable iron core. It is relatively fixed to the valve body 1 to drive the valve core 2 and the valve stem 3 to move.

[0049] like Figure 1 and Figure 2 As shown, the seal 4 is provided on the valve stem 3 , and the seal 4 is provided with a sealing block 41 , which abuts against the outer wall of the valve stem 3 and the inner wall of the installation cavity 103 ;

[0050] As shown in the above structure, a seal 4 is provided on the valve stem 3, and the seal 4 presses against the outer wall of the valve stem 3 and the inner wall of the installation cavity 103 through the sealing block 41, so that it is sealed after the valve core 2, thereby achieving a double sealing effect on the installation cavity. This can prevent the conveying medium from overflowing through the installation cavity 103 when the valve core 2 is damaged. At this time, the conveying medium will only enter the output channel 102 through the input channel 101, which can effectively protect the electromagnetic drive component and avoid leakage.

[0051] like Figure 2 , the sealing member 4 also includes a fixed seat 42 and an elastic member 43, wherein the fixed seat 42 is sleeved on the valve stem 3, and the fixed seat 42 and the valve stem 3 are relatively fixed; the sealing block 41 is sleeved on the valve stem 3, the sealing block 41 is located between the fixed seat 42 and the valve core 2, and the sealing block 41 and the valve stem 3 are slidably matched; the elastic member 43 is arranged between the fixed seat 42 and the sealing block 41, and the elastic member 43 is connected to the fixed seat 42 and the sealing block 41;

[0052] As shown in the above structure, when the electromagnetic drive assembly drives the valve core 2 and the valve stem 3 to move, the sealing member 4 moves as a whole. In order to ensure that the valve core 2 can block the input flow channel 101 and the output flow channel 102, the sealing block 41 can tightly abut the inner wall of the installation cavity 103, the sealing block 41 is slidably set on the valve stem 3 and connected to the fixing seat 42 fixed on the valve stem 3 through the elastic member 43; in this way, after the valve core 2 is in place, the sealing block 41 can be pressed by the elastic member 43, thereby achieving a good sealing effect.

[0053] Specifically, the elastic member 43 is an elastic washer or a spring.

[0054] like Figure 2 As shown, the seal 4 further includes a sleeve 44 and a slide rod 45, wherein the sleeve 44 is fixedly disposed in the fixing seat 42; one end of the slide rod 45 is slidably engaged with the sleeve 44, and the other end is connected to the sealing block 41;

[0055] As shown in the above structure, in order to ensure the stability of the movement of the sealing block 41, a sleeve 44 is further provided in the fixed seat 42, and the sealing block 41 is slidably matched with the sleeve 44 through the sliding rod 45 to achieve guidance; at the same time, the sealing block 41 can be prevented from circumferential rotation.

[0056] Specifically, the sleeve 44 can axially limit the sliding rod 45 to prevent the sliding rod 45 from completely falling out of the sleeve 44. This is a conventional structure.

[0057] like Figure 2 As shown, the sealing block 41 includes an outer layer 411 and a support member 412, wherein the outer layer 411 is made of rubber and the support member 412 is made of metal. The outer layer 411 covers the support member 412; the outer layer 411 abuts against the outer wall of the valve stem 3 and the inner wall of the installation cavity 103; the support member 412 is connected to the slide rod 45;

[0058] As described above, in order to ensure the structural strength of the sealing block 41, it is composed of an outer layer 411 made of rubber and a support member 412 made of metal. The outer layer 411 is injection-molded on the outer surface of the support member 412.

[0059] In order to ensure the overall structural strength, the sliding rod 45 is connected to the support member 412.

[0060] like Figure 2 As shown, the outer layer 411 and the support member 412 are both annular structures, and the inner ring of the support member 412 is exposed outside the outer layer 411; the first sealing ring 5 is arranged at the inner ring of the support member 412 and fits the valve stem 3;

[0061] As in the above structure, since the outer layer 411 is made of rubber material, in order to avoid deformation affecting the assembly of the first sealing ring 5, the inner ring of the support member 412 is set to an exposed structure for installing the first sealing ring 5, so that the first sealing ring 5 can stably resist the surface of the valve stem 3 to ensure the sealing effect.

[0062] like Figure 1 As shown, the second sealing ring 6 is provided on the circumferential surface of the valve core 2, and the second sealing ring 6 abuts against the inner wall of the installation cavity 103;

[0063] As in the above structure, in order to further ensure the sealing effect, a second sealing ring 6 is provided on the valve core 2 , thereby effectively improving the blocking sealing effect on the installation cavity 103 .

[0064] like Figure 1 As shown, the third sealing ring 7 is arranged on the circumferential surface of the fixing seat 42, and the third sealing ring 7 abuts against the inner wall of the installation cavity 103;

[0065] As shown in the above structure, a third sealing ring 7 is provided on the fixing seat 42 of the sealing member 4, which can also improve the blocking sealing effect on the installation cavity 103, thereby preventing the conveying medium from flowing through the gap between the sealing member 4 and the installation cavity 103 to the electromagnetic drive component when the valve core 2 is damaged, thereby avoiding the problem of component damage.

[0066] like Figure 2 As shown, the valve core 2 has a first conical surface 201, and the sealing block 41 has a second conical surface 401; the first conical surface 201 and the second conical surface 401 are both in contact with the inner wall of the installation cavity 103; the taper of the second conical surface 401 is greater than that of the first conical surface 201;

[0067] As in the above structure, the taper of the first conical surface 201 is small, which is conducive to tight sealing and can stably abut the inner wall of the valve body 1 to achieve a good sealing effect; by controlling the taper of the second conical surface 401 to be greater than the taper of the first conical surface 201, the distance between the second conical surface 401 and the valve core 2 can be increased, leaving space for the sliding of the sealing block 41, which is conducive to ensuring the compactness of the electromagnetic opening and closing structure.

[0068] like Figure 1 As shown, the fourth sealing ring 8 is arranged on the inner wall of the installation cavity 103 and abuts against the second conical surface 401;

[0069] As in the above structure, the fourth sealing ring 8 can ensure the sealing effect between the second conical surface 401 and the inner wall of the installation cavity 103 to prevent the medium from leaking.

[0070] Specific implementation steps:

[0071] During operation, an electromagnetic drive assembly is provided at the end of the valve body 1 away from the valve core 2 to drive the valve stem 3 and the valve core 2 to operate. When the valve core 2 moves away from the intersection of the input flow channel 101 and the output flow channel 102, the medium flows between the input flow channel 101 and the output flow channel 102. The reverse movement of the valve core 2 blocks the input flow channel 101 and the output flow channel 102.

[0072] The valve core 2, the sealing block 41 of the sealing member 4 and the fixing seat 42 all abut against the inner wall of the installation cavity 103 to achieve multiple sealing effects to prevent the electromagnetic drive assembly and other auxiliary components from being damaged due to leakage of the medium when the valve core 2 is damaged.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electromagnetic opening and closing structure of a hydraulic end valve group for a reciprocating pump, characterized by: The invention comprises a valve body (1), an electromagnetic opening and closing structure of a hydraulic end valve group for a reciprocating pump, and is characterized in that it comprises a valve body (1), a valve core (2), a valve stem (3) and a sealing member (4), wherein: The valve body (1) is provided with an input flow channel (101), an output flow channel (102) and an installation cavity (103), and the input flow channel (101), the output flow channel (102) and the installation cavity (103) are connected; The valve core (2) is slidably arranged in the installation cavity (103) to selectively block the input flow channel (101) and the output flow channel (102), and the valve core (2) and the installation cavity (103) are slidably sealed; The valve stem (3) is arranged on one side of the valve core (2) and is used for connecting to an electromagnetic drive assembly; The sealing member (4) is arranged on the valve stem (3), and the sealing member (4) is provided with a sealing block (41), and the sealing block (41) abuts against the outer wall of the valve stem (3) and the inner wall of the installation cavity (103).

2. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 1, characterized in that: The sealing member (4) further comprises a fixing seat (42) and an elastic member (43), wherein: The fixing seat (42) is sleeved on the valve stem (3), and the fixing seat (42) and the valve stem (3) are relatively fixed; The sealing block (41) is sleeved on the valve stem (3), the sealing block (41) is located between the fixing seat (42) and the valve core (2), and the sealing block (41) and the valve stem (3) are slidably matched; The elastic member (43) is arranged between the fixing seat (42) and the sealing block (41), and the elastic member (43) is connected to the fixing seat (42) and the sealing block (41).

3. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 2, characterized in that: The elastic member (43) is an elastic washer or a spring.

4. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 2, characterized in that: The sealing member (4) further comprises a sleeve (44) and a slide rod (45), wherein: The sleeve (44) is fixedly arranged in the fixing seat (42; One end of the sliding rod (45) is in sliding engagement with the sleeve (44), and the other end is connected to the sealing block (41).

5. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 4, characterized in that: The sealing block (41) comprises an outer layer (411) and a support member (412), wherein: The outer layer (411) is made of rubber material, the support member (412) is made of metal material, and the outer layer (411) covers the support member (412); The outer covering (411) abuts against the outer wall of the valve stem (3) and the inner wall of the installation cavity (103); The support member (412) is connected to the sliding rod (45).

6. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 5, characterized in that: It also includes a first sealing ring (5), the outer cladding (411) and the support member (412) are both annular structures, and the inner ring of the support member (412) is exposed outside the outer cladding (411); The first sealing ring (5) is arranged at the inner ring of the support member (412) and fits the valve stem (3).

7. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to any one of claims 1 to 6, characterized in that: It also includes a second sealing ring (6), which is arranged on the circumferential surface of the valve core (2), and the second sealing ring (6) abuts against the inner wall of the installation cavity (103).

8. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to any one of claims 2 to 6, characterized in that: It also includes a third sealing ring (7), which is arranged on the circumferential surface of the fixing seat (42), and the third sealing ring (7) abuts against the inner wall of the installation cavity (103).

9. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to any one of claims 2 to 6, characterized in that: The valve core (2) has a first conical surface (201), and the sealing block (41) has a second conical surface (401); The first conical surface (201) and the second conical surface (401) are both in contact with the inner wall of the installation cavity (103); The taper of the second tapered surface (401) is greater than the taper of the first tapered surface (201).

10. The electromagnetic opening and closing structure of the hydraulic end valve group for a reciprocating pump according to claim 9, characterized in that: It also includes a fourth sealing ring (8), which is arranged on the inner wall of the installation cavity (103) and is in abutment with the second conical surface (401).

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